Defender of the Crown Cheats

Call a tournament, or wait for a tournament to be called once you have gained enough land. When the jousting starts, lance the enemy's horse in the head, which will have you promptly thrown out of the tournament. All your land will be stripped. Now, raid your old castle (the one that was stripped), but do not acquire it! If this is done right, there should be a malfunction and you will have infinite money. You can now buy as many men as you want in your garrison.