Dynamic Campaign Generator (DCG) is a mod for the game "Men of War" and some of its successors that randomly generates skirmish missions and lets you keep your surviving forces from one battle to another. Some people find this mod tricky to install the first time - please read the readme.txt carefully and ask for help (if you need it) on our forums here on this site, or at the game developer's site.
I truly feel this mod rates a perfect ten. It takes what to me is the greatest sandbox to play in that I know of and somehow makes it even more of a dream come true to play around in. Thanks Devs!