Noob question about AI and diplomacy

[Zylithan]

Hi all - I'm brand new to Dominions, and trying to get into it, and get some friends into it. Apologies if this has been asked (I tried searching but didnt find anything).

In a game with multiple AI opponents, or with some players and some AIs...

1. Does the AI atack me more if I attack it first?

There's no official peace or truce agreements, right, but I feel like understood truces could exist. So, if I'm playing vs 2 AIs, should I get cheap victories from both, or just one, because taking an easy province from the second would launch me into a bigger war.

also...

2. Does the AI target players based on score? In MP I imagine people team up on the "winner".. does the AI do this? If so, what scales are most important? Does it know who is winning even if I turn scores off (players wouldn't, but sometimes AIs have special knowledge).

Thanks in advance!