Last War Headquarters Upgrade Priority and Prerequisite Guide

To progress efficiently in Last War, upgrade your Headquarters continuously while ignoring nonessential structures. Rushing your Headquarters unlocks higher troop tiers, elevated research branches, and increased hero level caps. Upgrading every facility evenly dilutes your builder uptime and stalls your combat strength.

Direct your builders exclusively along the mandatory prerequisite chain, keep your Tech Center active, and time major project finishes during weekly events.

Headquarters Milestones and Prerequisite Path

Every Headquarters level requires your defensive Wall to match the preceding Headquarters tier, along with one rotating prerequisite facility. You cannot start the next Headquarters upgrade until both conditions are met.

Focus your primary builder queue only on the single rotational facility required for the next tier. For example, if a tier demands a higher Barracks level, upgrade only one Barracks to satisfy the requirement rather than leveling all four.

Structure	Prerequisite Condition	Account Progression Role
Headquarters	Current-tier Wall and one rotating facility	Unlocks troop tiers, hero caps, and new research trees
Wall	Current-tier Headquarters	Universal gatekeeper required for every Headquarters upgrade
Tech Center	Current-tier Wall and preceding Headquarters	Enables development, economy, and military technology
Barracks	Current-tier Wall and preceding Headquarters	Unlocks higher troop tiers upon reaching level milestones
Drill Grounds	Current-tier Barracks and Wall requirements	Expands maximum unit march capacity for squads
Hospital	Current-tier Wall requirements	Expands capacity for wounded soldiers during battles

Target major milestone levels to unlock significant power spikes:

Headquarters 20: Unlocks Tier 7 (T7) troops.
Headquarters 24: Unlocks Tier 8 (T8) troops.
Headquarters 27: Unlocks Tier 9 (T9) troops.
Headquarters 30: Unlocks Tier 10 (T10) troops.

Secondary Building Priorities: What to Build and What to Skip

When your primary queue is handling long Headquarters or Wall upgrades, allocate secondary builder time strictly by utility:

Top Priority (Keep Maximized): The Tech Center. Tech research must never sit idle, and high-level combat branches require an upgraded facility.
High Priority (Immediate Follow-up): A single Drill Grounds to expand your squad march size, followed by the Alliance Center and Hospital to support cooperative play and casualty recovery.
Low Priority (Delay or Skip): Resource production fields (Gold Mines, Iron Mines, Farmlands). Map gathering and raiding provide far greater yields than passive base production, making resource field upgrades an inefficient use of builder time and resources.
Minimal Priority: Duplicate Barracks and the Radar station. Keep duplicates at lower operating levels until your Headquarters reaches your milestone goal or a specific mission requires an upgrade.

Construction Efficiency and Speed-Up Management

Multi-day construction timers require disciplined use of items and alliance bonuses:

Equip Construction Buffs First: Assign survivors with construction buffs and equip relevant builder gear before initiating an upgrade to lock in reduced base timers from the start.
Reserve the Second Queue for Long Projects: Never expend temporary or paid second builder queues on short, low-level projects. Dedicate that queue to multi-hour prerequisite structures.
Wait for Full Alliance Help: Request Alliance Help immediately after starting a project. Each member assist cuts a percentage of the remaining construction timer. Let the help bar fill completely before using any speed-ups so you do not waste percentage-based deductions on shortened timers.

Timing Upgrades for Alliance Duel

Hold major completions and speed-up stockpiles for Day 2 of the weekly Alliance Duel, which is dedicated to base construction.

Completing high-level upgrades like the Headquarters, Wall, and Tech Center during Day 2 awards large point multipliers toward individual and alliance chests. If a massive upgrade is scheduled to finish between duel stages, allow it to progress naturally or hold your speed-ups in reserve until the construction stage begins. Cashing in speed-ups on Day 2 secures top-tier reward chests containing recruitment tickets, gems, and fresh speed-up items to reinvest into your next milestone.