From Warzone Wiki
Advancements are upgrades you can find in Warzone Idle. They are purchased using advancement points (AP).
There are four phases of advancements. Each requires an amount of AP to be spent in the previous phase before they are unlocked:
- Phase 2 requires 1,000 AP spent in Phase 1.
- Phase 3 requires 8,000 AP spent in Phase 2.
- Phase 4 requires 25,000 AP spent in Phase 3.