Is it possible to build the crusade specific units(Teutonic Knights, Order Foot Soldiers etc.) Usually when I start a crusade the crusade will start with one unit of each. Is there a way to add more of these units to your crusade, or once the crusade is over is it possible to retrain these units to bring them back to full strength? I'm asking this because last night, while playing as the English, a German crusade came marching through my territory, I happened to click on it to check the makeup of it and noticed they had 3 full strength units of Teutonic Knights.