Question alliance level

I have a problem. why not raise my level of Alinza if I donated 400k in gold? As I raise my level of alliance? Where I can find information about the partnership? (Advantages, Disadvantages)

Hi.

When you donate, then in donate main you must press upgrade button.

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Have a good time.

What is gained by having a large alliance?

you can chat with more people, get a higher gold boost, and, in a later update, get unit boosts