Whiteout Survival Infantry Camp Guide: Upgrade Requirements, Troop Levels & Fire Crystal Costs

The Infantry Camp is the Whiteout Survival military building used to train, promote, and improve Infantry troops. It unlocks when your Furnace reaches Level 7 and eventually gives access to regular Infantry tiers from T1 through T10. Infantry normally forms the frontline of a troop march. As a result, weak Infantry can cause a formation to collapse even when its Lancers and Marksmen have strong damage stats. This Whiteout Survival Infantry Camp guide covers Level 1–30 upgrade requirements, Infantry troop levels, T9 and T10 unlocks, troop promotion, training speed, Fire Crystal Infantry Camp upgrades through FC10, Helios Infantry T11, and the newer Exalted Infantry T12 progression.

What Is the Infantry Camp in Whiteout Survival?

The Infantry Camp is one of the three primary troop-training buildings. The three troop camps are:

• Infantry Camp: trains frontline Infantry.
• Lancer Camp: trains Lancers.
• Marksman Camp: trains Marksmen.

Upgrading the Infantry Camp provides several forms of progression:

• Unlocks higher Infantry troop tiers.
• Increases Training Capacity.
• Improves troop-training efficiency.
• Increases building Power.
• Unlocks troop promotion at the T5 milestone.
• Later allows Fire Crystal Infantry progression.

When Does the Infantry Camp Unlock?

You unlock the Infantry Camp when your:

Furnace reaches Level 7

The initial Infantry Camp begins at Level 1. After that, the Camp’s required Furnace level gradually increases until the Camp and Furnace progress together.

Why Infantry Troops Matter

Infantry is normally the frontline troop type in Whiteout Survival combat. Its main job is to survive incoming damage long enough for the rest of your formation to perform effectively. Strong Infantry is particularly important for:

• City attacks and defense
• Sunfire Castle
• State of Power
• Fortress and Stronghold battles
• Rallies and garrisons
• Alliance Championship
• Canyon Clash
• Other troop-based PvP content

However, this does not mean every march should contain only Infantry. Infantry, Lancer, and Marksman troops work together, and the best troop ratio changes according to the event, Heroes, enemy formation, and account progression.

Whiteout Survival Infantry Troop Levels

The Infantry Camp unlocks regular troop tiers at specific building levels.

What Furnace Level Unlocks T9 Infantry?

T9 Infantry unlocks at:

Infantry Camp Level 26

The Infantry Camp itself requires:

Furnace Level 26

Therefore, if you are searching for the Whiteout Survival T9 troop Furnace requirement, the answer for Infantry is Furnace 26 and Infantry Camp 26.

What Level Unlocks T10 Infantry?

T10 Infantry unlocks at:

Infantry Camp Level 30

This also requires a Level 30 Furnace. T10 is the highest regular Infantry tier unlocked directly through normal Infantry Camp progression.

Infantry Camp Upgrade Requirements Level 1–30

The following table shows the main base upgrade requirements for the Infantry Camp. Construction times are base values before Research, State buffs, Alliance Help, Chief bonuses, and other Construction Speed effects.

Troop Promotion Unlocks at Infantry Camp 13

Infantry Camp Level 13 is one of the most useful early military milestones because it unlocks:

• T5 Infantry
• Troop Promotion

Promotion lets you convert lower-tier Infantry into your highest currently trainable Infantry tier instead of leaving a large low-tier army behind.

Should You Train New Troops or Promote Old Troops?

Early in the game, prioritize building enough total troops to fill your active March Queues. Once your army is large enough to field the marches you need, promotion becomes more attractive because it increases the quality of troops you already own. Promotion does not require the full cost of training the target troop from zero. Its time and resource requirement are based on the difference between the troop’s current level and the level you are promoting it to.

Why Promote Low-Tier Troops?

Higher-tier troops provide more useful combat strength per troop slot. They also help avoid filling important battle and recovery capacity with large numbers of weaker units. Promotion can be especially valuable when an event rewards troop Power gained or troop upgrades.

How to Get More Troops in Whiteout Survival

There are two separate goals:

• More troops: increase the total size of your army.
• Stronger troops: unlock and promote to higher tiers.

To grow troop count faster:

1. Keep the Infantry Camp training whenever practical.
2. Keep the Lancer and Marksman Camps training as well.
3. Increase Training Capacity.
4. Improve Training Speed.
5. Use Training Speedups during valuable event windows.
6. Use temporary Training Speed buffs when planning large batches.

An idle training camp produces no new troops, so consistent queue uptime matters more than occasionally using a large amount of Speedups.

How to Increase Infantry Training Capacity

Upgrading the Infantry Camp naturally increases the number of Infantry you can train in a single batch. You can further increase Training Capacity through:

Camp Expansion research

Camp Expansion is found in the Growth section of the Research Center. A larger batch is useful when:

• You cannot log in frequently.
• You want longer training queues overnight.
• You are using large Training Speedups.
• You are preparing for troop-training events.

How to Train Infantry Faster

Infantry Camp upgrades improve training efficiency, but Research also matters. The main early research to look for is:

Training Tools

Training Tools decreases the time needed to train a batch of troops. Other ways to improve troop-training efficiency can include:

• Temporary Training Speed buffs
• Minister bonuses when available
• VIP bonuses at applicable levels
• Research
• Training Speedups
• Event-specific bonuses

Best Infantry Camp Upgrade Milestones

Fire Crystal Infantry Camp

After normal Level 30 progression and the required state development, the Infantry Camp enters Fire Crystal progression. Fire Crystal building upgrades do not jump directly from Level 30 to FC1. Each complete Fire Crystal level contains several intermediate sub-levels. For example:

Level 30 → 30-1 → 30-2 → 30-3 → 30-4 → FC1

Then:

FC1 → FC1-1 → FC1-2 → FC1-3 → FC1-4 → FC2

The pattern continues through FC10.

Infantry Camp Fire Crystal Level Requirements

Infantry Camp FC2 to FC3 Requirements

To move an Infantry Camp from full FC2 to full FC3, you complete five upgrades:

• FC2-1
• FC2-2
• FC2-3
• FC2-4
• FC3

Each of those current stages requires:

• Furnace FC3
• 27M Meat
• 27M Wood
• 5.5M Coal
• 1.3M Iron
• 107 Fire Crystals

Therefore, the full FC2 → FC3 Infantry Camp progression requires approximately:

• 135M Meat
• 135M Wood
• 27.5M Coal
• 6.5M Iron
• 535 Fire Crystals

The combined base construction time is approximately 8 days and 6 hours before Construction Speed reductions.

Infantry Camp FC6 Cost

The Infantry Camp’s FC5 → FC6 progression is also important because Refined Fire Crystals are now part of the upgrade requirements. The first four stages each use:

• 90 Fire Crystals
• 4 Refined Fire Crystals

The final FC6 stage uses:

• 45 Fire Crystals
• 9 Refined Fire Crystals

Across the complete FC5 → FC6 Infantry Camp progression, that equals:

405 Fire Crystals + 25 Refined Fire Crystals

This refers specifically to the Infantry Camp. A generic search for “WOS FC6 cost” may refer to the Furnace or another building, which has different requirements.

Fire Crystal Infantry Skills

Fire Crystal progression does more than increase building Power. Important Infantry troop milestones include:

• FC3: first Fire Crystal troop skill milestone.
• FC8: second Fire Crystal troop skill milestone.

Therefore, FC3 and FC8 are more meaningful progression points than ordinary intermediate sub-levels.

Do Fire Crystal Levels Create T11 Infantry?

No. Fire Crystal Infantry Camp upgrades and troop tiers are related but separate progression systems. The Camp can progress through Fire Crystal levels, but T11 Helios Infantry still requires its own War Academy research.

How to Unlock Helios Infantry T11

Helios Infantry is not a normal Infantry Camp Level 31 troop. It is a separate:

Tier 11 War Academy research unlock

The current Helios Infantry research requires advanced War Academy progression and prerequisite Infantry technologies. Because the War Academy has its own long research tree and Fire Crystal Shard requirements, T11 should be treated as a separate late-game project rather than a normal Camp upgrade.

Whiteout Survival Now Has T12 Exalted Infantry

Older Whiteout Survival guides may still say that Helios Infantry is the final troop tier. That is no longer complete for current late-game states. Whiteout Survival now includes:

T12 Exalted Infantry

To begin T12 progression:

1. Your state must reach the required age.
2. You must have unlocked the corresponding T11 Helios Infantry.
3. Eligible Flame Tech becomes available in the War Academy.
4. You progress through the required T12 research.

You cannot unlock Exalted Infantry simply because you have another troop type at T11. For example, the Infantry T12 path requires that you have unlocked Helios Infantry first.

What Is Special About Exalted Infantry?

T12 progression adds more than base stats. Exalted Infantry can eventually unlock the exclusive skill:

Indomitable Wall

This is a rally and garrison-oriented Infantry skill that reduces enemy troop damage for a limited number of turns and can stack from qualifying rally or garrison members according to the current skill rules. T12 is deep endgame progression, so most early and mid-game players should focus on T8, T9, T10, and later T11 before worrying about it.

Should You Upgrade Infantry Camp Before Other Troop Camps?

Infantry deserves strong priority because it is your frontline, but ignoring Lancers and Marksmen creates an unbalanced army. A better approach is:

1. Keep all three military Camps reasonably close to your Furnace progression.
2. Prioritize the Camp that unlocks an important troop-tier milestone next.
3. Do not leave Infantry several tiers behind your damage troops.
4. Plan expensive upgrades around events when useful.

Best Infantry Camp Strategy for F2P Players

F2P players should focus on unlock milestones rather than rushing every intermediate upgrade with Speedups.

Save Speedups for Useful Event Windows

Camp upgrades and troop training frequently overlap with events that reward:

• Building Power
• Troop Power
• Training troops
• Promoting troops
• Using Speedups

If delaying an upgrade does not block important progression, pairing it with a relevant event can improve the value of your limited resources.

Do Not Hoard Low-Tier Infantry Forever

Once promotion is available, periodically convert old troops into your current useful tier. However, if your total army is still too small to fill your marches, continue training new troops as well.

Best Infantry Camp Tips

1. Keep Training Queues Active

Consistent training builds troop count over time without requiring large Speedup spending.

2. Upgrade for the Next Tier, Not Just Power

The most valuable Camp levels are usually the ones that unlock a new troop tier or promotion.

3. Research Camp Expansion

Higher Training Capacity lets you queue more troops at one time.

4. Research Training Tools

Reducing troop-training time compounds across every future training batch.

5. Promote Old Troops

Once your total army is large enough, promotion is an efficient way to improve existing low-tier troops.

6. Keep All Three Camps Progressing

Infantry needs Lancers and Marksmen behind it to form effective troop marches.

7. Plan Fire Crystal Spending

Fire Crystals are shared across many important buildings, so do not upgrade the Infantry Camp automatically without checking your current Furnace and account priorities.

8. Do Not Treat T11 or T12 as Normal Camp Levels

Helios and Exalted Infantry depend on War Academy research, not simply continuing the normal Infantry Camp troop-tier ladder.

Common Infantry Camp Mistakes

Ignoring Infantry Because Marksmen Deal More Visible Damage

Without enough frontline durability, your damage troops can become exposed much earlier in battle.

Missing the Level 13 Promotion Unlock

Troop promotion becomes available with T5 at Camp Level 13 and is an important long-term army-management tool.

Thinking T9 Requires Furnace 30

T9 Infantry unlocks at Infantry Camp 26, which requires Furnace 26.

Thinking Fire Crystal Levels Automatically Unlock T11

Helios T11 requires separate War Academy research.

Thinking T11 Is Still the Final Troop Tier

Eligible late-game states now have T12 Exalted troop progression through War Academy Flame Tech.

Rushing Every Fire Crystal Sub-Level

Compare Infantry Camp upgrades with your Furnace and other important FC buildings before committing scarce crystals.

Only Training New Troops Forever

Once your army is large enough, promoting old low-tier troops can be more useful than continually adding weaker units.

Only Promoting and Never Increasing Army Size

New players still need enough total troops to fill their available marches, rallies, and event formations.

FAQ

When do you unlock the Infantry Camp?

The Infantry Camp unlocks when your Furnace reaches Level 7.

What level unlocks T9 Infantry?

T9 Infantry unlocks at Infantry Camp Level 26, which requires Furnace Level 26.

What level unlocks T10 Infantry?

T10 Infantry unlocks at Infantry Camp Level 30.

When can you promote Infantry?

Troop promotion unlocks at Infantry Camp Level 13 together with T5 Infantry.

How do you train Infantry faster?

Upgrade the Infantry Camp, research Training Tools, use applicable Training Speed bonuses, and spend Training Speedups strategically. Camp Expansion increases batch capacity rather than directly reducing training time.

How many Fire Crystals does Infantry Camp FC2 to FC3 need?

The current full FC2 → FC3 Infantry Camp progression contains five stages at 107 Fire Crystals each, for a total of 535 Fire Crystals.

How do you unlock Helios Infantry?

Helios Infantry is T11 and requires separate War Academy research. It does not unlock directly from a normal Infantry Camp level.

Is Helios Infantry the highest troop tier?

Not in eligible current late-game states. T11 Helios Infantry can later progress into T12 Exalted Infantry through War Academy Flame Tech after the necessary state-age and research conditions are met.

Conclusion

The Whiteout Survival Infantry Camp controls most of your regular Infantry progression, from the first T1 troops through T10 at Camp Level 30. The most important early milestone is Level 13 because it unlocks T5 Infantry and troop promotion. From there, Level 22 unlocks T8, Level 26 unlocks T9, and Level 30 unlocks T10. After normal Level 30 progression, the Infantry Camp continues through Fire Crystal upgrades all the way to FC10. Later levels also begin requiring Refined Fire Crystals, so planning becomes increasingly important. However, Fire Crystal Camp progression should not be confused with troop-tier research. T11 Helios Infantry is unlocked separately through the War Academy, and current late-game states can now continue from unlocked T11 Helios Infantry into T12 Exalted Infantry through Flame Tech. For most players, the best strategy is to keep troop queues active, target meaningful Camp milestones, promote lower-tier troops once your total army is large enough, improve Training Capacity and Training Speed through Research, and save expensive Fire Crystal upgrades for a clear progression goal. For more building guides, troop progression tips, and Whiteout Survival strategies, explore our Whiteout Survival guides. Whiteout Survival may adjust building costs, construction times, Fire Crystal requirements, troop research, and endgame troop systems in future updates. Check the current in-game Infantry Camp and War Academy before committing large amounts of resources or Fire Crystals.