O-oh, the Mount & Blade expansions. One of the best games I've played dealing with army building, land claiming, war strategy, and much more. Personally, I think Warband was the "it" for me, it improved very much from its last game, the original Mount & Blade that got me introduced to the platform. I bought the first Mount & Blade out of curiosity and I wanted to try to play something different, least it was a good ten bucks, so I suppose not much money would have been lost. And, oh, mercy, best spent ten dollars.
Then, once I researched about the Warband, I wanted it! I currently have it thanks to generous people on the net and enjoy every minute commanding my army and taking the lords' lands for my faction. I really recommend this game to anyone is likes the themes that Mount & Blade offer, Napoleonic Wars that focus on that era, the Mount & Blade for medieval, and so on. You have not truly played a medieval game if you have skipped this one. ?