Last War HQ 31-35 Rush Guide: Prerequisites and Upgrade Order

To upgrade your Headquarters from Level 31 to Level 35 in Last War without stalling progress, you must treat your Defense Wall as a permanent background project, funnel builder queues exclusively into prerequisite buildings, and keep all Petroleum (Oil) safely boxed in your inventory until an upgrade begins.

Entering the Level 31 to 35 bracket in Seasons 2 and 3 introduces Petroleum as a core resource alongside Food, Iron, and Gold Coins. Each Headquarters tier also raises your maximum hero level cap by five levels, reaching Level 175 at HQ 35.

HQ 31 to HQ 35 Prerequisites and Unlocks

Every Headquarters level requires an upgraded Defense Wall alongside one designated secondary facility. Never leave your Defense Wall until your Headquarters finishes; start the next Wall tier immediately so your builder queues never wait on multi-day wall timers.

Managing the Oil Economy and Inventory

Petroleum becomes your primary progression bottleneck from Level 31 onward. Passive generation from Oil Wells and Oil Refineries cannot cover the massive spikes required for HQ 33 through HQ 35.

• Keep resource chests unopened: Store all Oil, Iron, Food, and Coin containers in your bag until the exact moment you start a construction timer. Holding open Oil in your base makes you an attractive target for enemy plundering during Warzone Duel Kill Events.
• Collect active Oil rewards: Maximize seasonal tasks, daily event milestones, and alliance territory harvests to stockpile Oil chests between upgrade pushes.
• Budget Gold Coins for heroes: Do not drain all your Gold Coins into base prerequisites. Leveling a primary squad of five heroes from Level 150 to 175 requires billions of Gold Coins; pace your construction spending so your squad combat power increases alongside your base level.

Construction Priority: What to Rush and What to Pause

Builder queues stretched across weeks require strict discipline. Deviating into non-essential buildings delays your hero caps and overall progression.

1. Headquarters and Defense Wall: One builder queue should focus on the current Headquarters while another manages the upcoming Defense Wall level.
2. Key Prerequisites: Upgrade your Tech Center, Drill Grounds, and primary unit training facility only to the exact level required by the next HQ threshold.
3. Oil Production: Level Oil Refineries and Oil Wells whenever prerequisite requirements are satisfied.
4. Buildings to pause: Leave secondary resource fields, minor storage depots, and off-branch training facilities (such as Aircraft or Missile Centers if your main squad runs Tanks) at Level 30 until HQ 35 completes.
5. Stagger training centers: Upgrading a barracks or unit center temporarily halts or slows your unit training. Avoid upgrading multiple unit facilities at once so you maintain steady troop replenishment.

Optimizing Speedups and Construction Buffs

Because HQ 31 to 35 timers span several weeks, applying construction speedups without active modifiers wastes thousands of speedup hours. Prepare every major timer with the following sequence:

1. Request the Construction Minister title: Ask alliance leadership for the Construction Minister appointment before queueing any Defense Wall or HQ project.
2. Check VIP and development buffs: Ensure your VIP status is active for the percentage reduction, and activate construction boost items from your inventory.
3. Queue during Alliance Duel Day 2: Start your largest upgrades and invest your universal speedups on Building Day (Day 2 of the weekly Alliance Duel) to secure individual milestone chests and alliance event points.
4. Wait for Alliance Helps first: Do not burn speedups immediately after starting a construction project. Let your alliance fill your Help bar first; each help removes a percentage of the total initial base time, saving the maximum possible duration before speedups apply.