Bombard Cannon is a technology in Age of Empires II that can be researched at the Siege Workshop once the Imperial Age is reached and Chemistry is researched. Once researched, Bombard Cannons can be trained. Bombard Cannon is available to all civilizations except for the Britons, Celts, Chinese, Japanese, Mongols, and Vikings. With the introduction of The Conquerors, the Bombard Cannon technology was removed from the game, meaning that Bombard Cannons become available as soon as Chemistry is researched.