During the Crusades, each town receives special units listed below. By the way, you can get the cheapest knight :
Aresden
Temple Knight
Battle Golem
Mercenary
Light War Beetle
Catapult
Elvine
God's Hand Knight
God's Hand Knight Calvary
Mercenary
Light War Beetle
Catapult
Contribution Points
Slaying an enemy will gain contribution points. The higher level(knight noah) enemy you kill, the more experience and gold you will gain. At the end of the war, the winner of the war will keep all it's newly gained contribution points, and be rewarded according to the amount of the contribution points. The loser of the war will lose all of their contribution points gained in battle, and will not be rewarded. Hope the article could help you more or less, see you next time.