Last War Zombie Siege Strategy Guide

For Last War: Survival alliance leaders who want to know why their alliance stalls at wave 15 and what the top alliances do differently from wave 1.

Zombie Siege is not an endurance test for your strongest accounts. It is an alliance coordination problem, and the rewards follow how well your leaders manage it.

The mechanics are simple. The hard part is running 20 waves with members at different strength levels, getting reinforcement timing right and keeping cooldown discipline. That is where most alliances leave rewards on the table. Alliances that clear deep every cycle do not have stronger heroes. Their leaders plan the event instead of reacting to it.

This guide covers how Zombie Siege works, the wave chart that makes reinforcement calls obvious, the best hero setup for Siege defense, the five rules top alliances enforce, and the clue points that control which levels your alliance can pick.

How Zombie Siege works

Zombie Siege is a recurring PvE alliance event where waves of undead attack every player base at the same time. Each Siege runs 20 waves (Last War Tutorial).

The rules behind every coordination decision:

• Zombies get stronger and more varied as waves go on. Early waves are easy to handle alone. Late waves need coordinated defense across the alliance.
• Personal rewards depend on how many waves your own base holds. Once your base is breached, you get no more attacks. Alliance rewards depend on the total waves the whole alliance holds, and members need 48 hours in the alliance to claim them. Rewards come by mail at the end.
• An R4 or R5 picks the level before the event starts. Each level has a minimum HQ requirement and needs clue points, which members collect through radar tasks (for example +300 for killing Doom Legion enemies, plus small amounts for kills, gathering and digging). Skipping clue collection keeps the alliance stuck at lower levels.
• There is a cooldown between each Zombie Siege cycle. Use it to collect clues, retrain troops and set defense squads before the next event opens. Marshall's Guard is the other regular alliance event to plan around. Our Marshall's Guard guide covers its rallies and rewards.

Zombie Siege is about collective output, not personal power. One unprepared member hurts alliance reward depth more than your strongest account helps it.

Wave breakdown chart

Knowing the wave structure lets you plan reinforcements instead of reacting. The game does not publish wave stats, so treat this as our pacing plan across the 20 waves, not official data:

The rule the chart enforces: do not send reinforcements before wave 11. Reinforcing a member at wave 4 does little for alliance survival. Early waves are easy enough to handle alone. Spending reinforcement capacity in waves 1 to 10 leaves nothing for waves 16 to 20, where it actually changes the result.

Best hero setup for Zombie Siege

Zombie Siege rewards AoE damage and frontline durability over precision or burst. Each wave sends several zombie types at once, so area damage gets more kills per round than single-target burst.

For the Tank formation, the main squad for most accounts, use the lineup most 2026 sources recommend: Murphy and Williams in the front row, Kimberly, Stetmann and Marshall in the back row.

• Frontline: Williams stays the anchor. His Iron Will defense boost, which spreads to the whole squad as you level it, keeps the formation alive through each wave. Murphy next to him adds survivability in later waves.
• Main AoE: Kimberly's Barrage Strike is the best Zombie Siege skill in the game. Eight rockets hitting random targets across a wave kill more units per activation than any other hero ability.
• Secondary damage: Stetmann adds damage from the back row. Some players run DVA here for priority targets that survive Kimberly's AoE, though she is generally listed as an Aircraft hero.
• Support: Marshall raises the squad's attack and crit through every wave.

Chip preset discipline: run a separate Zombie Siege chip preset instead of your PvP setup. Siege needs AoE, sustained output and wave survival. PvP needs burst, single-target priority and march size. Using one generic preset for both is one of the most common hidden performance losses in Last War: Survival.

Base Defense research (the Base Defense, Troop Resistance and Hero Power trees) adds directly to Zombie Siege survivability. Members who have skipped these trees will underperform for their hero roster in every Siege cycle.

The five coordination rules top alliances use

Rule 1: set the defense squad before the event opens

No reinforcement can cover a member with no defense squad. Bases without a set squad die at wave 1, however strong their heroes are. R5s should pin a reminder 24 hours before the event and check compliance by screenshot. No exceptions.

Rule 2: no reinforcements before wave 11

Make it an alliance rule, not a suggestion. Members who reinforce early burn capacity the alliance needs later. Keep at least one squad in your own base, as Last War Tutorial advises. Save all reinforcement capacity for when the alliance actually needs it.

Rule 3: do not extinguish burning HQs

When an HQ catches fire during Zombie Siege, the instinct is to spend Diamonds to put it out. In almost every case that is wasted budget. Accept the burn, take the wave pressure, and send reinforcement resources to members who can still add to alliance wave depth.

Rule 4: assign reinforcement targets before the event starts

Pick your 5 to 10 most vulnerable members in advance and assign stronger players to cover each one. Do not decide who covers who during the event. Reactive reinforcement arrives too late. Planned reinforcement arrives at wave 11, when it changes the result.

Rule 5: collect clue points every cooldown window

Clue points come from radar tasks between Sieges. Missing clue collection in even one cooldown delays the alliance's move to higher difficulty tiers, which means lower reward ceilings for every member in every cycle after that. Make clue collection a standing alliance requirement, tracked the same way as VS Day participation.

Zombie Siege difficulty levels

Zombie Siege runs across several levels. Each level has higher zombie strength and a higher reward ceiling, and each one needs a minimum HQ level and enough clue points. An R4 or R5 picks the level before the event starts, so the call is a leadership decision, not a member one.

The simple rule: pick the highest level where your bottom half of the roster can still hold the late waves. A level your top 10 can clear but your bottom 30 cannot gives fewer alliance waves than one step lower.

At higher levels, surviving waves 16 to 20 comes down to four things: Base Defense research, a set defense squad built on AoE heroes like Kimberly, planned reinforcement that arrives at wave 11 instead of a scramble at wave 18, and a dedicated Zombie Siege chip preset.

Preparation is a roster problem

The gap between an alliance that clears 20 waves and one that stalls at 14 is almost always the preparedness of the bottom half of the roster. That means hero upgrades, troop training and base defense research across all members, not just the top players.

Where Packsify fits

A deeper Siege needs the bottom half of the roster built, and hero and troop packs speed that up. Packsify buys the exact Last War pack you pick through the official Apple App Store or Google Play, with more pack value for the same money. New to Packsify? Start with the Last War top up guide and how we keep accounts safe.

Last War also runs an official web store, store.lastwar.com, which adds a 5% Gold Brick bonus to every recharge and gives an avatar frame. If you use it, that is fine. Packsify is for players who want the exact App Store or Google Play pack bought for them.

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More Last War guides: best squad lineup, Kimberly build, Last War alliance guide.

Sources: Last War Tutorial Zombie Siege page. Checked October 30, 2026.

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