"The Bombard is a primitive cannon used to fire stone projectiles at enemy positions. Invented in China around the 12th century, it reached Europe perhaps 200 years later. The bombard 'Mons Meg' was constructed by the Duke of Burgundy in 1449 and given as a gift to King James II of Scotland. It saw use for over 200 years before its barrel exploded. With a caliber of 20 inches, Mons Meg was one of the largest cannons in history."
Bombards are efficient alliance troops that can help defend Town Centers. Their high damage can take out Generals and other strong units such as Heavy Cavalry. Bombards can also take a large amount of infantry if they are clumped together. Bombards are also ranged so they can shoot over walls against enemy troops without being attacked by melee units such as Heavy Infantry. This makes Bombards the number one donated war troop for defense.
Use the Angkor Wat to heal them as they attack enemy troops. That way, they can last longer as they are being attacked.