Last War Research Calculator: How to Plan Every Tech Tree Without Running Out of Resources

Most Last War: Survival players hit the same wall. They queue up a research node, burn through their food and iron, and then — right in the middle of a Special Forces gatekeeper — discover they are 1,200 valor badges short with no events scheduled for two weeks. The research queue sits empty. The power gap between them and their server’s top players widens. And there is nothing they can do about it except wait.

That wall is not bad luck. It is a planning problem. And a calculator solves it in about two minutes.

The Last War Research Calculator above was built specifically to prevent that scenario. Enter your current research levels, your target nodes, and your active speed buffs — and it immediately outputs the exact food, iron, gold, coins, valor badges, armament materials, and speedup time standing between you and your next milestone. Every prerequisite node is chained automatically. Nothing is hidden. No spreadsheet required.

This guide explains every research tree in the game, the real resource numbers behind T10 and T11 unlock, the strategic sequencing that separates fast progressors from players stuck at the same power level for months, and the timing decisions that turn a good research plan into a great one.

Why Research Is the Only Progression in Last War That Never Goes Away

Troops can be killed. Buildings get hit. Gear can be replaced. Research stays. Every node you complete in the Tech Center is permanent — it adds a specific percentage to a specific stat and that percentage applies every time your troops fight, every march you send, every rally your alliance runs. It never resets. It never degrades. No one can take it from you.

This permanence is what makes research sequencing so consequential. A player who completes Development research speed nodes in month one gets a 10–15% research time reduction applied to every single research node they ever complete afterward. That compounds. Over the course of a full T10 path — which takes 60 to 90 days of real time for most active players — that early speed investment can save the equivalent of two to three weeks of queue time.

The flip side is equally unforgiving. Research nodes that were completed in the wrong order, or badge-heavy nodes that were started outside event windows, represent permanent inefficiency. Those badges cannot be refunded. That time cannot be recovered. This is why veteran players treat research planning as a financial decision, not just a gameplay preference.

Every Last War Research Tree: What It Costs and What It Delivers

Last War: Survival organizes research into distinct tech trees, each unlocked progressively as your Headquarters and Tech Center levels increase. Here is what each tree actually does, what it costs, and when it should be on your queue.

Development Research Tree — Research First, Build Faster Forever

Development is the multiplier tree. Every node you complete here permanently reduces construction time, research time, or both. The most important nodes — Fast Builder I through IV and Research Enhancement I through IV — should be the first thing you push in any research plan.

Here is why. When you complete a Development research speed node early, every subsequent research in every other tree finishes faster because of it. The cost of the Development nodes is paid once. The benefit applies indefinitely. A 15% research speed reduction applied across a full T10 grind saves more speedup items than most players calculate when they are still at HQ Level 10 wondering whether to research Development or Military first.

Primary resources required: Food, Gold — badge-free entirely

Tech Center unlock: Available from the beginning

Key nodes: Fast Builder I–IV, Research Enhancement I–IV, Extra Barracks, Efficient Healing, Infirmary Expansion

Strategic rule: Always complete Development research speed and construction speed nodes before starting any long Military or Special Forces chain. The compound saving is always worth the brief queue diversion.

Economy Research Tree — Passive Income That Runs While You Sleep

Economy research increases your farms, mines, and refineries’ production output, expands storage capacity, and raises the resource cap before plundering becomes possible. It costs no valor badges and generates real returns every hour, every day, for the life of your account.

A player who completes Economy production nodes in the first month generates measurably more resources over the following six months than a player who skips them. The math is not complicated: a 20% food production increase running every hour for 180 days yields more food than the research nodes cost to complete. Run this tree concurrently with Development — both are badge-free and both compound everything that follows.

Primary resources required: Iron, Gold — badge-free entirely

Key nodes: Production output nodes for Food, Iron, Gold; storage expansion nodes; load capacity upgrades for farming marches

Strategic rule: Run Economy research in Queue 2 (or Queue 1 once the Second Tech Center is unlocked) at all times. Never let your queues sit empty on trees that cost zero badges.

Special Forces Research Tree — The Only Path to T10 Troops

Special Forces is the most searched, most discussed, and most mismanaged research tree in Last War: Survival. The reason it gets mismanaged is that most players start it without a complete picture of what it actually costs.

The tree has one purpose: to unlock Tier 10 troops (Unit X). Getting there requires completing the entire tree up to and including four specific gatekeeper nodes at the bottom. Those four nodes are Advanced Protection, HP Boost III, Attack Boost III, and Defense Boost III. Every node above them contributes to the path but only these four are the actual gates to Unit X.

The four gatekeepers require:

• HQ Level 30 — non-negotiable prerequisite before the gatekeeper chain becomes available
• Tech Center Level 30 — required alongside HQ 30
• Valor Badges at every gatekeeper node — the primary constraint for most players

Total Special Forces tree cost (0 to max, no buffs): approximately 2.5 billion Gold, 1.8 billion Iron, 1.8 billion Food, and 2,398 Valor Badges. The final Unit X research node alone costs 500 to 600 million Gold depending on your resource reduction buff level. With Senior Scientist alliance research at Level 6 applying a 3% resource cost reduction, these figures decrease modestly — but the badge count remains effectively fixed.

The gatekeeper that kills most plans is not Gatekeeper 1 or 2. It is Gatekeeper 3. By that point, players have committed weeks of queue time and hundreds of millions of resources. Then they discover they need another 800 to 1,000 badges to reach Gatekeeper 4 and they only earn 200 to 300 per week from Alliance Duel. The queue stalls for a month.

Use the calculator before you start the first gatekeeper. Enter your current badge stockpile and your average weekly badge income. The calculator tells you your deficit date — the day you will have enough badges to clear each gate. That date is your real T10 unlock timeline, not the resource farming timeline most players focus on.

Primary resources required: Food (heaviest), Iron, Gold, Coins, Valor Badges (mandatory at all four gatekeepers)

Strategic rule: Never start a gatekeeper node unless your badge stockpile plus projected income covers the full remaining gate cost before your next major war event. Mid-chain stalls are the most expensive research mistake in the game.

Military Research Tree — Direct Combat Power Across All Troops

The Military tree is where research translates directly into combat outcomes. It covers troop attack percentages, defense ratings, HP multipliers, and march size increases across Infantry, Lancer, and Marksman unit types.

The single most important decision in Military research is specialization. Most players spread their research evenly across all three unit types early and end up with mediocre stats across the board instead of dominant stats in one. Specializing in one type — Tanks are the most balanced for beginners, with strong offensive and defensive profiles — and completing its branch before touching others creates significantly higher real combat power at lower total research investment.

The Hero research tree within Military is an extension of this principle. Push only the Hero tree branch that matches your primary squad’s unit type: Tank Mastery if you run Tanks, Aircraft Mastery if you run Aircraft, Missile Mastery if you run Missiles. Badge investment in the wrong hero branch does not carry over to the unit type you actually fight with.

Primary resources required: Food, Iron, Gold, Coins — Valor Badges required at advanced tiers

HQ Level requirement: Progresses from HQ 6 through HQ 30+

Key benchmarks: T9 completion is the floor for competitive participation. T10 plus maxed Military research is the ceiling most active servers operate at, delivering 40–60% higher effective combat stats than T10 unlock alone.

Alliance Duel Research Tree — Weekly Income That Compounds Every Season

The Alliance Duel tree is unlocked through Alliance Duel (VS) event participation and governs your reward quality from that recurring event. Two specific nodes make this tree mandatory as soon as it opens: Advanced Rewards and Super Bonus.

Advanced Rewards unlocks Tier 2 reward boxes (Chests 4–6) with significantly better badge and speedup yields. Super Bonus opens Tier 3 boxes (Chests 7–9) with top-tier badges, consumables, and speedups. These two nodes activate every single Alliance Duel week from the moment they are completed. Every week you delay completing them is a week of permanently lower chest quality that cannot be recovered.

Time the completion of these nodes specifically to Alliance Duel Day 3 — the Age of Science or Bednest Day depending on your server’s schedule. Finishing expensive badge nodes during this ranking window earns event points simultaneously. One research completion, two forms of value.

Primary resources required: Valor Badges, Food, Iron

Strategic rule: Complete Advanced Rewards and Super Bonus immediately when the Alliance Duel tree unlocks. These are the second-highest-priority badge expenditure in the game after Special Forces gatekeepers — because they increase badge income from every future Alliance Duel.

Defense Fortifications Tree — One Node Worth Unlocking, Rest Can Wait

Defense Fortifications covers wall HP, trap capacity, shield mechanics, and base protection stats. For most players in active progression toward T10, this tree is low priority — with one important exception.

The first node in the Defense Fortifications tree unlocks your fourth hospital. Fourth hospital means more troop recovery capacity after PvP events. That additional recovery capacity has real value in any war-active server environment. Complete the first node, then park the tree until T10 is unlocked and badges are less constrained.

The rest of the tree — wall HP upgrades, trap production bonuses, shield duration increases — delivers situational value for players who hold contested resource tiles or participate heavily in base defense events. It is not a priority for power progression toward T10.

Age of Oil Research Tree — Unlock Immediately When Available

The Age of Oil tech tree appears after early progress in Special Forces and introduces Oil as a new research resource. It is cheap, fast, and delivers disproportionately high returns relative to its cost: construction speedups, research speedups, training speedups, cost reductions, and hospital expansion bonuses that apply across your entire base.

Unlock the Age of Oil tree immediately when it becomes available. It requires oil — generated passively once the relevant season mechanic unlocks — and does not compete with badge allocation. The benefits compound immediately and continue applying to every upgrade you make afterward.

Every Research Resource in Last War: Survival — What It Is and How to Get More

Understanding the supply constraints on each resource is what makes a research plan executable, not just theoretical. Here is a complete breakdown.

Food

The highest-demand research resource across Military and Special Forces trees. Late-game T10 gatekeeper nodes each require hundreds of millions. Primary sources are maxed farms with Economy research buffs applied, resource tile farming, alliance gifts, and event rewards. Food is farmable — it is not the bottleneck that stops most players.

Iron

A mid-demand resource consumed by both research and building upgrades simultaneously. The dual demand creates competition in your resource allocation. Iron mines with Economy research applied are the primary source. When both your construction queue and research queue are active, iron becomes the tightest common resource.

Gold

Primary currency for Economy and Development trees, and consumed heavily by Military research at advanced tiers. Gold Refineries with Legendary Survivor assignments and the 24-hour production buff active are the baseline. Dead base farming — scouting inactive players who hold large gold stockpiles — supplements production for players who need to accelerate T10 node costs.

Coins

Universal research currency earned from events, Alliance Duel participation, daily missions, and alliance activities. Every tree consumes coins. Never spend coins on optional or low-priority items when Special Forces gatekeepers are in your active plan — a single Unit X node costs 500 to 600 million coins and those coins cannot be farmed quickly.

Valor Badges

The most constrained resource in the entire game. Valor Badges are the blue hexagonal medals required at Special Forces gatekeeper nodes and Alliance Duel research. They cannot be farmed passively. The complete source list is:

• Alliance Duel (VS) Chest 9: The single highest daily badge yield available. Reaching Chest 9 consistently is the fastest legitimate badge accumulation method.
• PvP event leaderboard rankings: Top placement in server kill events and rally events distributes badges to ranked participants.
• Server distribution milestones: Server-wide participation rewards include badge allocations at threshold levels.
• Alliance Duel Advanced Rewards and Super Bonus research: Completing these nodes permanently increases your Chest 7–9 chest quality, raising badge yield per Duel cycle.

A player averaging 200 to 300 badges per week and facing a 2,000-badge deficit is 7 to 10 weeks from clearing it — regardless of how much food and iron they stockpile. Badge timeline is the real T10 unlock date for most players. Calculate it in the calculator before committing to the gatekeeper chain.

Armament Materials and Cores

Exclusive to T11 research. These materials drop from high-level world boss events and elite seasonal content in limited weekly quantities. They cannot be purchased or traded. Do not start T11 research nodes until your Military research is advanced — T11 troops under-buffed by incomplete Military research deliver less combat value than fully-buffed T10 troops.

Oil

The Age of Oil era research currency. Generated passively once the relevant season mechanic unlocks. Consumed by Age of Oil tech tree nodes. Not in direct competition with other research resources — manage it independently of your badge and food allocation.

Speedup Items

Last War speedups convert directly into research completion time. Denominations: 1-minute, 5-minute, 10-minute, 30-minute, 1-hour, 3-hour, 8-hour, and 24-hour. The calculator converts your total remaining research time into the optimal combination of these denominations so you know exactly what to stockpile before committing to a long node chain. General principle: use 24-hour and 8-hour items for long single nodes. Reserve smaller items for nodes you want to complete during event windows where partial completion timing earns additional event points.

How Research Speed Buffs Stack in Last War — and Why the Math Matters

Research speed buffs in Last War are multiplicative at the buff category level. This is not obvious from the in-game interface, and it is why most players dramatically underestimate how much a full buff stack saves.

Here is an example. A research node has a base time of 30 days.

• Secretary of Science (max level): +25% research speed → effective time: 30 ÷ 1.25 = 24 days
• VIP Level 20 bonus: additional +10% → 24 ÷ 1.10 = 21.8 days
• Alliance tech research reduction: additional +10% → 21.8 ÷ 1.10 = 19.8 days
• Event buff window (Research Boost event): additional +15% → 19.8 ÷ 1.15 = 17.2 days

The same 30-day node completes in 17.2 days with a full buff stack active — a reduction of nearly 43%. Across a full T10 research path that would take 90 days unbuffed, that 43% reduction saves approximately 39 days of real time. That is not a rounding difference. That is five to six weeks of competitive advantage over a player with identical resources who runs zero buffs.

The calculator applies your specific buff percentages to every time estimate it generates. Input accurate numbers — Secretary percentage from her current development level, your actual VIP level, your alliance’s current research tech reduction — and the calculator output reflects your real account state, not a best-case scenario.

Event Timing: The Multiplier Most Players Miss

Every research completion that coincides with an active event generates two forms of value simultaneously: the permanent stat increase from the research itself, and the event points or rewards triggered by the milestone. Players who understand this timing earn measurably more from the same research investment than players who queue and forget.

Alliance Duel Day 3 (Age of Science / Bednest Day)

This is the highest-value research timing window in Last War’s recurring calendar. Finishing badge-heavy nodes specifically so they complete during Day 3 of the Alliance Duel event earns ranking points while delivering the research completion. Top alliance officers deliberately delay the start of expensive gatekeeper nodes until they can calculate that completion will fall on Day 3.

How to time it: Use the calculator to find your remaining time on the target node with your buffs applied. Count backwards from the next Day 3 date. Start the node so completion aligns with that window. If the window is two days away and the node takes 1.5 days, start it now. If the node takes 4 days and Day 3 is in two days, hold it until the following cycle.

Research Rush Events

Last War periodically runs Research Rush events that award points and prizes for completing research above specific speedup thresholds during the event window. If you have a large research chain planned, check whether a Research Rush event appears on the upcoming event calendar before burning a single speedup. Batching completions inside the event window converts your speedup investment into additional event rewards.

Server Anniversary and Seasonal Milestones

Server anniversary events and seasonal milestone events typically include research task chains that award speedups, badges, or resources for completing a certain volume of research during the event period. Track these dates on your alliance’s event calendar. A research chain that costs 500 million food also earns 50,000 speedup minutes in event rewards when its completions fall during the right window.

The practical system: maintain a 1 to 2 week buffer of researches ready to start but not yet initiated. Confirm the upcoming event calendar at the beginning of each week. Start nodes timed to complete during the highest-value window available that week. This discipline consistently outperforms the approach of starting nodes the moment resources are available.

The Correct Research Sequence by HQ Level — Phase by Phase

There is no single “best” research order that works for every player in every alliance on every server. But there is a framework of sequencing decisions that consistently produces faster power growth than random node selection. Here it is, organized by HQ level phase.

Phase 1: HQ Levels 1–14 — Build the Foundation

Every upgrade you complete in this phase benefits from speed nodes completed in this phase. Development Research Enhancement and Fast Builder nodes are your absolute first priority. Run Economy production nodes in parallel — they cost zero badges and every hour they are active, they are generating resources that fund future research. Do not touch Special Forces, Alliance Duel, or badge-heavy Military nodes at this stage. Badges earned here are more valuable spent at the right moment later.

Research benchmarks to hit before moving to Phase 2: Development research speed nodes at least halfway complete. Economy production nodes generating noticeably higher hourly resource output than base rate.

Phase 2: HQ Levels 14–22 — Military Specialization

Choose your primary unit type. Tanks are the strongest starting point for most players — balanced offense and defense, strong performance in both rally and defense scenarios, and the most community knowledge available for optimization. Push your chosen unit type’s Military tree branch ahead of the others. Also start the corresponding Hero tree branch — Tank Mastery if you run Tanks, Aircraft Mastery for Aircraft, Missile Mastery for Missiles.

Research benchmarks at this phase: HQ 22 Military completion — 45% Units tree, 35% Hero tree, and beginning Special Forces nodes. If you are above these percentages at your HQ level, you are ahead of the typical power curve.

Phase 3: HQ Levels 22–25 — Alliance Duel Tree Priority

The moment your Alliance Duel research tree unlocks, the first two nodes — Advanced Rewards and Super Bonus — jump to the top of your badge expenditure priority. These nodes pay back in increased badge income every single Alliance Duel week from completion forward. Every week you delay is a week of permanently lower chest yields. Complete both nodes, timed to Day 3 of the Alliance Duel event cycle for maximum value.

Phase 4: HQ Level 25–30 — Special Forces and the T10 Gate

This is the most resource and badge-intensive phase in Last War progression. Before entering any gatekeeper node, run the calculator with your current Special Forces levels, your valor badge stockpile, and your weekly badge income. Confirm that your projected badge accumulation date arrives before the next major war event on your server’s calendar.

Do not start gatekeeper chains mid-event-cycle. Do not start them with insufficient badge income to clear the full remaining gate. The only timing error more expensive than starting a gatekeeper without enough badges is starting one without verifying the timing — and then stalling for four weeks because you miscounted.

Research benchmarks by HQ level: HQ 27 target — 70% Units, 60% Hero, 35% Special Forces. HQ 30 target — 80% Units, 70% Hero, 40% Special Forces plus all four gatekeepers in queue or complete.

Phase 5: Post-T10 — T11 Research and Maxing Military

After T10 troops are unlocked and promoted, two priorities compete: completing Military research to max (which increases the stats of your already-unlocked T10 troops) and beginning T11 research (which introduces Armament Materials as a new constraint). The recommended approach for most players is to complete Military research to at least 85–90% across your primary unit type before committing Armament Materials to T11. A fully-buffed T10 troop with max Military research consistently outperforms a T11 troop with incomplete Military research.

Frequently Asked Questions

Does the calculator include prerequisite nodes automatically?

Yes. When you set a target research level, the calculator automatically chains every prerequisite node required to unlock it. If you target T10 Infantry, every gatekeeper and supporting node below it is included in the total cost output. This prevents the most common planning mistake — underestimating true cost because hidden prerequisites were overlooked.

Can I use this calculator on my phone?

Yes. The calculator works in any mobile browser on iOS or Android without installation. No account or app download is needed.

How accurate are the resource figures in the calculator?

All resource figures are based on community-verified in-game data and are updated with each major Last War patch. The most reliable verification method is always to cross-reference the calculator output against your actual in-game research screen before committing speedups to a long node. If you find any discrepancy, use the contact form to report it — accuracy is non-negotiable for a planning tool to be useful.

What happens if I run out of valor badges mid-gatekeeper chain?

Your research queue stalls. The gatekeeper node sits at its current level and cannot advance until badges are available. Your queue goes empty. Meanwhile, every alliance member who planned their badge income correctly continues advancing. There is no mechanic to accelerate badge income beyond Alliance Duel participation and event ranking. The only solution is to have calculated the full gate cost before starting — which the calculator does in about 30 seconds.

Is T11 research worth prioritizing over completing Military research?

For most players, no. T11 troops with incomplete Military research buff trees deliver less combat value than T10 troops with completed Military research. Armament Materials are restricted resources — spending them to unlock T11 before maxing Military research is a long-term efficiency loss. Complete Military research to at least the advanced tiers before committing Armament Materials.

How do I earn valor badges faster?

The highest-yield badge source is consistently reaching Alliance Duel Chest 9 every day. Every chest beyond 7 increases badge yield significantly. This requires consistent Alliance Duel participation from your alliance members — badge income is a team activity, not a solo one. Secondary sources include PvP event leaderboard placement and completing the Alliance Duel Advanced Rewards and Super Bonus research nodes, which permanently increase your chest quality.

What is the Second Tech Center and when should I unlock it?

The Second Tech Center becomes available after clearing District 102. It adds a second simultaneous research queue. Unlock it immediately — it doubles your research throughput from that point forward. Optimal split: Queue 1 runs badge-free trees (Development, Economy) continuously. Queue 2 runs badge-heavy trees (Special Forces, Alliance Duel) timed to Alliance Duel Day 3 event windows.

Should I promote T9 troops to T10 or train new T10 troops from scratch?

Always use the promote function. Click Barracks, select your T9 troops, click the Promote arrow. Promoting converts existing T9 troops into T10 troops for a fraction of the time it would take to train T10s from zero. Training T10 troops from scratch when you have T9 troops available is one of the most common and most expensive efficiency errors in endgame Last War play.

About This Calculator and Who Built It

This Last War Research Calculator was designed by Daud Ali, the calculator specialist behind dluip.com. Every resource figure in the tool is cross-referenced against community-verified in-game data. The tool is updated with each major Last War: Survival patch that affects research costs, resource requirements, or tree structure.

Dluip builds free, accurate calculators across multiple categories — advertising metrics, construction planning, fitness, and gaming tools. The same calculation standards applied to every other tool on this site apply here: if a number in the calculator does not match what you see in your game, it is a bug, and it gets fixed.

If you find an error in any resource figure, use the contact form to report it with your current game version and the specific node where the discrepancy appears. Accuracy is the only thing that makes a planning tool worth using over a guess.

The calculator is and will remain completely free. No sign-up. No subscription. No ads blocking the tool itself.

Page last updated: June 25, 2026 · Verified against Last War: Survival current patch · Covers T9, T10, T11, Age of Oil, and Alliance Duel research trees