A one-hour alliance-vs-alliance battle on its own map, scored by controlling buildings.
TL;DR Get into a legion, be on time, and hold buildings, the Imperial Foundry above all. Your troops come back afterwards, so play aggressively.
When
About every 2 weeks
Battle
1 hour
Who
Top-20 alliances by power
Teams
Up to 2 legions × (30 + 10 subs)
🗓️Timeline
Stage
Length
What happens
Voting
2 days
Every member votes on a battle time. R4/R5 pick the final slot from the results.
Registration
2 days
Leaders pick up to 30 combatants + 10 substitutes per legion. Join the alliance before this ends.
Matchmaking
2 days
You’re paired with an opponent by voted time and Alliance Power.
Battle
1 hour
Phase 1 buildings open first. Phase 2 adds the Imperial Foundry, Munitions Warehouse and Mercenary Camp.
From the official help center. To qualify, your alliance must be top 20 on the state Alliance Power leaderboard before voting starts.
🏭Buildings & points
Building
First capture
Per minute
Notes
Imperial Foundry
9,000
1,800
The main prize. Hold it. (Phase 2)
Prototype Site
6,000
1,200
Second priority. (Phase 1)
Repair Facility
3,000
600
Corner buildings. Easy early points (Phase 1)
Boiler Room
1,200
240
(Phase 1)
Transit Station
1,200
240
(Phase 1)
Munitions Warehouse
1,200
240
+15% troop damage (Phase 2)
Mercenary Camp
1,200
240
Enables strike teams (Phase 2)
Values from community trackers; the same buildings and values appear in the Tundra Arms League Foundry tournament. Weapon Workshops also spawn at random later in the battle.
🧮Scoring
The alliance with the most Arsenal Points at the end wins. Points come from first captures, holding buildings over time, Arsenal Supplies, Weapon Workshops and defeating enemies (one tracker lists 80 points per 10,000 enemy power).
Personal points only affect your own rewards, not who wins. Holding beats trading: one building held for the whole hour outscores several quick captures.
🎯Strategy
No permanent losses: injured troops recover after the battle, so commit fully.
Grab the Phase 1 buildings fast, then park teams next to the Imperial Foundry before Phase 2 opens.
Coordinate both legions: decide who attacks, who garrisons and who rallies.
React fast when points drop on a building you hold. Reinforce first, retake second.
Leaving the battlefield triggers a re-entry cooldown, so don’t step out casually.
🎁Rewards
Personal Arsenal Points are spent in the Arsenal Shop on hero shards and gear materials.
The winning alliance gets bonus resources and items on top.