12 12AD. According to the inquiry, the total war 12 12AD Mongolia's western expedition was a fierce and heroic expedition. The pioneering work of Total War series was released in 2000. 12 12AD is a series. The game is set in the Warring States Period in Japan. Players play the role of Japanese clan members, conquer the whole country and win the title of general. 200 1, the information piece "Mongolian invasion" was released, and the background was the Yuan-Japanese War.