I'm not sure if the following is a bug but certainly it is surprising and unannounced. I'm playing 3.0.1 with a development modmod that should have nothing to do with the Indians (trade automation changes). Basically, I am fighting a moderately sized Indian tribe with big camps, size 11,8, etc. In total around 7 camps (villages) left, three destroyed. Then out of a sudden, in the AI's turn, all the tribe's camps reduce to size 1 no matter if they are far or near my territory / troops. From looking at a savegame before and after, it looks like they "rushed" all their pop into braves (1:1 ratio). Ok, so this seems like an AI behavior. Is this supposed to be possible (rushing 10 pop in one turn)? If this is a feature instead a bug, it would be very nice and cool to have some sort of an announcement / event popup (Indian mobilization / migration?) since the effect is quite dramatic. Edit: most villages immediately grew to pop 3 from 1 the next turn.