An alliance can gain Prestige Levels by earning the required amount of Alliance XP (AXP) for that Level. You can check the required Alliance XP to reach the next Prestige level in the Prestige Level section accessed by tapping on the “Alliance” Icon. Remember this is a team effort!You can earn XP for your Alliance by doing the following actions:
- Donating Troops and Resources
- Respond to Speed-up Requests
- Assign Members to Strike Forces
- Winning Alliance Wars
- Donate free Social War Factory Components
- Respond to Gunship Requests.
You can also earn Alliance XP from the first 10 Battle Wins of the day and from Building and Research Upgrades. 
Remember, you can only earn Alliance XP from any of the actions mentioned above, only if you are a member of an Alliance. (Trivia: did you know that you get 5 nukes the first time to join an Alliance?)Once you and your Alliance Members earn enough XP, your Alliance will rise in Prestige; Level Up, and unlock a powerful new Perk!
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Empires & Allies Game GUIDE