The Operational Art of War IV offers a huge array of scenarios and campaigns covering almost every military operation that occurred in this conflict, ranging from multi years campaigns to single (but crucial!) battles.
Our forum user Primarchx has done a nice overview of these scenarios contained in the game, giving his impressions and thoughts on scale, kind of units and so on!
Take a look here! It’s definitely a good post if you want to read a bit about this setting!