So yea I just beaten the Crusades campaign in Medieval II Total War Kingdoms with the Kingdom of Jerusalem. The objective was hold 25 provinces including, Baghdad, Jerusalem, Trilopoli, Limassoli, etc. It took me a while and it was kind of hard even though it's on medium. It also took a while to conquer just a couple of provinces, reach 25, and hold them for a specific amount of time. My greatest challenge was the Mongols because they just kept coming with just infinite armies coming out of nowhere, but I prevailed and now I have beaten it. Hooray!

Here's an overview of the campaign which The Creative Assembly made.