Hey Raellus,
I have Vista Home premium on my pc.
The game runs fine even if the system requirements don't list Vista.
However, to be completely honest, I've found that during some of the later turns with large games (300 plus units on both sides, after about 25 or so turns) the combat results window disappears or fails to show. (This window shows the results of each combat during the turn.) I usually just minimize and come back and it goes to the next combat sequence in the turn without any adverse affects.
I went to the Matrix games forum and searched for Vista problems. This problem seems to be related to something else and not Vista (XP users sometimes have this problem as well).
Here are the two threads from the Matrix games forum
http://www.matrixgames.com/forums/tm...vista�
http://www.matrixgames.com/forums/tm...vista�
let me know if you have any other questions about the Operational Art of War III. you can hit my inbox or send me an email boogiedowndonovan at gmail.com