As the provisional Capital of China for almost ten years (1937 to 1945), the city was also known as one of the three headquarters of the Allies during World War II, as well as being a strategic center of many other wars throughout China's history. Chongqing has many historic war-time buildings or sites, some of which have since been destroyed. These sites include the People's Liberation Monument, located in the center of Chongqing city.