Last War Construction Parts Guide: Alliance Exercise Strategy

Construction Parts in Last War: Survival are used during Alliance Exercise to upgrade the Marshal’s Guard donation bonus before the battle. Alliance members contribute Parts together, increasing rally damage through five bonus levels. Current 2026 references document a maximum of +25% rally damage after 500 Construction Parts.

Construction Parts come from Daily Tasks, and donating them also rewards Alliance Contribution. Even after your alliance reaches the maximum battle bonus, additional donations can still be made for the personal contribution reward.

What Are Construction Parts in Last War?

Construction Parts are a special resource connected to Alliance Exercise, also commonly called the Marshal’s Guard or Marshal’s Exercise event.

Their two confirmed uses are:

• Increase the alliance’s battle bonus: donations improve the Marshal’s Guard preparation bonus for the current exercise.
• Earn Alliance Contribution: each donated Part awards contribution to the player.

Construction Parts are not normal materials for upgrading Headquarters buildings, military centers, or alliance structures. Their purpose is specifically tied to the Alliance Exercise donation system.

How the Construction Parts Damage Bonus Works

During the Alliance Exercise preparation phase, members donate Construction Parts to the Marshal’s Guard or training ground. Current 2026 event references show five donation levels, with each level adding 5% rally damage.

Donation Level	Cumulative Construction Parts	Alliance Exercise Damage Bonus
0	0	No donation bonus
1	100	+5%
2	200	+10%
3	300	+15%
4	400	+20%
5	500	+25%

Level 5 is the maximum damage-bonus level for a single Alliance Exercise. Reaching it before combat begins gives every participating member the full donation-based advantage for the event.

How Much Alliance Contribution Do Construction Parts Give?

Official Last War Support states that donating Construction Parts grants +500 Alliance Contribution per donation. Current community event references describe this as 500 contribution for each Construction Part donated.

This makes donations useful even when your alliance has already reached the maximum damage bonus. Alliance Contribution can then support purchases through the Alliance Store.

For active alliances, this is an important reason not to simply ignore leftover Parts once level 5 has been reached.

Where to Get Construction Parts

Daily Tasks are the confirmed source of Construction Parts. Both the game’s support documentation and current item references identify Daily Tasks rather than a broad collection of unrelated shops or event drops.

Complete your Daily Tasks consistently and claim the available milestone rewards. Missing Daily Tasks does not just reduce your personal resources; across an entire alliance, repeated missed Parts can prevent the group from reaching the full +25% damage bonus before Marshal’s Guard begins.

Why Daily Participation Matters

The alliance only needs 500 total Parts for the maximum battle bonus, but that target becomes much easier when many members contribute instead of depending on a small core of active players.

For example, if 25 members each bring 20 Parts, the alliance reaches 500. The exact distribution does not matter—the Marshal’s Guard bonus is shared progression.

How to Donate Construction Parts

You can reach the donation interface through Alliance Exercise before the battle begins.

1. Open the Event Hub.
2. Select Alliance Exercise.
3. Tap the available Go, View, or preparation option shown by the current interface.
4. Open the Marshal’s Guard or Drill Field preparation screen.
5. Select the Construction Part donation option.
6. Donate your available Parts.

The exact button labels can change between interface versions, but the Alliance Exercise page directs you to the active preparation structure.

For more help navigating limited-time activities, see the Last War Event Hub guide.

Should You Save Construction Parts?

For an active alliance preparing for its current Alliance Exercise, donating is normally more useful than holding the Parts. The first 500 Parts improve rally damage, and donations after the maximum bonus still produce Alliance Contribution.

There are two situations to separate:

Situation	Recommended Action
Alliance has less than 500 Parts donated	Donate. Reaching the next level directly improves event damage.
Alliance already has the +25% maximum	You can still donate for Alliance Contribution.
Alliance leadership specifically wants to preserve Parts	Check the current item/event description and follow alliance instructions.
You are unsure whether Parts carry into another exercise	Do not assume. Check the live item description because official support does not state a universal expiry rule.

The older version of this guide suggested saving Parts based on possible expiry or carryover behavior. That was too speculative. The confirmed mechanic is simpler: Parts raise the current exercise’s battle bonus, and you can continue donating for contribution after the bonus cap.

What Is Alliance Exercise?

Alliance Exercise is a cooperative rally event in which the alliance fights Marshal’s Guard tanks. Current event references describe the combat phase as lasting 30 minutes, with the event recurring roughly every two to three days depending on the server and event cycle.

R4 and R5 officers handle the setup, including the difficulty and event timing. During combat, five tanks appear and the alliance works through five cumulative reward phases by dealing enough total damage.

There are both alliance-wide rewards and individual rewards, making participation valuable even for players who are not among the strongest members.

Why Construction Parts Matter More Than They Look

A +25% alliance-wide rally damage bonus is much more valuable than a small personal stat increase because it applies across repeated rallies from many participating players.

Suppose an alliance would otherwise deal 1 billion qualifying rally damage during the event. A full +25% donation modifier represents a substantial increase across that entire damage volume. The real result depends on the game’s damage calculations, formations, rally composition, and other buffs, but the principle is the same: skipping free preparation damage is inefficient.

This is why Construction Part donations should be one of the first items on an Alliance Exercise checklist.

Construction Parts Bonus vs Reward Phases

There are two different five-level systems that players sometimes confuse:

System	How It Progresses	What It Does
Construction Part donation levels	Donate Parts during preparation	Raises the battle damage bonus up to level 5
Alliance reward phases	Deal damage during the 30-minute battle	Unlocks progressively better alliance rewards up to Phase 5

Maxing Construction Parts before combat helps the alliance reach the later reward phases, but reaching donation level 5 does not automatically mean the event itself has been cleared.

Best Alliance Exercise Strategy After Donating

Construction Parts provide the preparation bonus. Your alliance still needs efficient rally coordination to turn that bonus into damage.

Recall Your Squads Before the Event

Bring squads back from mines, gathering tiles, and other deployments roughly 5–10 minutes before the scheduled start. A strong formation cannot join Marshal rallies while it is occupied elsewhere.

Move Close to the Marshal Platform

Short march distances allow more rally cycles during a 30-minute event. Players several minutes away from the platform can slow rallies and reduce the number of attacks the alliance completes.

Start Rallies With a Weaker Squad

For players with at least two formations, the common strategy is to start a rally with the weaker squad and use the strongest squad to join other rallies.

The rally leader’s squad spends time waiting through the rally countdown. Keeping your best squad available to join rallies lets it deal damage more frequently.

Use Three-Minute Rallies

Alliance Exercise uses three-minute rallies. Direct solo attacks and normal one-minute rallies do not replace the required Marshal rally format.

Join the Best Officer Rallies

Officer-led rallies can display additional damage bonuses. Prioritize R5 and qualifying R4 rallies when the rally interface shows the higher modifier, especially for your strongest formation.

Heal Between Rally Cycles

Wounded troops sitting in the Hospital cannot contribute to the next attack. Heal manageable batches and request Alliance Help so more troops return to combat during the event.

The Last War Alliance Support Hub guide explains the broader Alliance Help system.

How Alliance Exercise Combat Stats Affect Damage

Construction Parts increase the event’s battle damage bonus, but your underlying squad still determines how much damage you can produce.

Important factors include:

• Hero levels and stars.
• Hero skills and Exclusive Weapons.
• Hero gear.
• Troop tier.
• March Size.
• Troop Attack, Defense, and HP.
• Drone progression.
• Research.
• Formation bonuses.
• Officer and War Fever bonuses where applicable.

The Last War Troop Stats guide explains how the core troop attributes contribute to overall formation strength.

Construction Parts Strategy for Alliance Leaders

R4 and R5 officers can make Construction Part donations nearly automatic with simple communication.

1. Post the Alliance Exercise start time in advance.
2. Remind members to complete Daily Tasks and bring their Construction Parts.
3. Track whether the alliance has reached 100, 200, 300, 400, and 500 total Parts.
4. Push to level 5 before combat begins whenever possible.
5. Remind members that post-cap donations still provide Alliance Contribution.
6. Ask everyone to recall squads before the event.
7. Position the Marshal platform close to the alliance hive or rally point where the current event setup allows it.
8. Choose a difficulty the alliance can clear reliably instead of chasing a level that leaves reward phases unfinished.

This is more effective than relying on one or two high-power members. Construction Part progression and Marshal damage both reward broad participation.

Construction Parts Strategy for F2P Players

Construction Parts are an F2P-friendly Alliance Exercise mechanic because their confirmed source is Daily Tasks rather than a paid-only shop.

Lower-power players can still contribute meaningfully by:

• Completing Daily Tasks consistently.
• Donating every available Construction Part.
• Positioning close to the Marshal platform.
• Using their weaker formation to start rallies.
• Joining strong rallies with their best available formation.
• Healing and requesting Alliance Help between attacks.
• Continuing to launch or fill rallies after their own reward threshold if alliance members still need help.

Your Construction Part donation has the same effect on shared bonus progression regardless of whether your strongest squad is 5 million or 50 million Power.

Players who prefer to begin with more established hero, troop, and base progression can optionally compare Last War accounts for sale, but for Alliance Exercise specifically, evaluate the main squad, troop tier, March Size, Hospital capacity, research, Drone development, and server progression rather than total account Power alone.

Construction Parts Quick Reference

Question	Answer
Main use	Increase the Alliance Exercise battle bonus
Confirmed source	Daily Tasks
Maximum donation level	5
Parts for maximum current bonus	500
Maximum documented damage bonus	+25%
Alliance Contribution	+500 per donation
Can you donate after the cap?	Yes, for Alliance Contribution
Where to donate	Marshal’s Guard / Drill Field through Alliance Exercise
Battle duration	30 minutes
Rally format	Three-minute rallies

Common Construction Parts Mistakes

Not Completing Daily Tasks

Daily Tasks are the confirmed source of Construction Parts. When many alliance members skip them, reaching the full donation bonus becomes unnecessarily difficult.

Forgetting to Donate Before Combat

Parts sitting unused provide no damage bonus. Reaching level 5 after several important rallies have already finished means the alliance spent part of the event fighting below its potential.

Stopping Donations at 500

The battle bonus stops increasing at level 5, but official support confirms that additional donations still give Alliance Contribution.

Confusing Donation Level 5 With Reward Phase 5

Donation levels improve combat before and during the event. Reward phases are earned by dealing damage. They are different progression systems.

Inventing Extra Construction Part Sources

Older guides often list generic events, missions, or chests without confirming them. Current official support specifically identifies Daily Tasks as the Construction Part source, so check the live game before assuming another activity awards them.

Saving Parts Based on an Unverified Expiry Rule

The current support documentation confirms continued post-cap donations but does not provide a universal statement that Parts always expire after an exercise. Check the current item description before making carryover assumptions.

Maxing the Bonus but Ignoring Rally Strategy

A +25% modifier does not fix long marches, unavailable squads, weak rally rotation, or poor healing. Preparation and execution both matter.

FAQs

What are Construction Parts used for in Last War?

Construction Parts are donated during Alliance Exercise to raise the Marshal’s Guard battle bonus. Current guides document five donation levels, increasing rally damage up to +25%.

Where do you get Construction Parts?

Official Last War Support identifies Daily Tasks as the source of Construction Parts.

How many Construction Parts are needed for the maximum bonus?

Current 2026 Marshal’s Guard references document 500 total Parts for the five donation levels, giving a maximum +25% rally damage bonus.

Do Construction Part donations give Alliance Contribution?

Yes. Official Last War Support states that each donation grants +500 Alliance Contribution.

Should I keep donating after reaching the +25% bonus?

You can. The battle bonus stops increasing after level 5, but official support confirms that additional Construction Part donations still award Alliance Contribution.

Should I save Construction Parts for the next Alliance Exercise?

Normally, prioritize the current exercise until your alliance reaches its maximum damage bonus. After that, donations still provide Alliance Contribution. If your alliance wants to hold Parts for a future cycle, check the current item description and event rules rather than assuming a universal carryover or expiry rule.

Conclusion

Construction Parts are a simple but important Alliance Exercise resource: earn them through Daily Tasks, donate enough to push the Marshal’s Guard to level 5, and give your alliance the full +25% rally damage bonus before the battle begins. Even after the bonus is maxed, further donations can still provide Alliance Contribution.

Combine that preparation with short march distances, three-minute rallies, strong squad rotation, and active healing to get more from every event. For more alliance, hero, building, and progression strategies, browse the Heaven Guardian Last War Survival guides.