After waiting 20 or so years for all of my armies to journey to Italy, I've finally started the invasion:
Here is the battle I had after I took this screenshot. I took one of my "main" armies (one commanded by a general, comprised of 4 heavy cavalry, 5 archers, and 10 heavy infantry), and two "support" armies (20 infantry units, because the AI tends to suicide charge their cavalry, and no archers because of how much friendly fire they dish out) and attacked the Papal armies that were clumped together. My AI armies unfortunately set up in a disadvantageous position, so I took my force and extended the line up the hill hoping to be able to crush whoever came at me and then wrap around to relieve my allies:
Here's an up close shot of my infantry fending off the extremely tough Swiss Gaurd unit, with the more enemies approaching:
Here is the aftermath, thousands of dead men scattered among the hills:
A wide angle shot:
Here's the battle summary:
Some unit stats:
I know they're not the best screencaps, but I had to post them because this was the largest battle I've had yet in the campaign. I also didn't take more during the battle because I was having so much fun playing it, and I needed to focus because the enemy Swiss Guard units nearly obliterated me. If not for repeated cavalry charges into their flanks I would have been done for!