Why did they declare war?

[NintendoTogepi]

Do you have the whole map from fairly recent World Map trades? Its possible Mao stuck a city down near Alex since you last updated the area, and it was quickly converted to Hinduism, and you just dont know it yet because your map info is too old.

I suppose. He conquered an Egyptian city. (right next to Alexander's cities that are all Hindu)

I guess I was AP'd...how frustrating !