The southern Ming was a loyalist movement that was active in southern China following the Ming dynasty's collapse in 1644. The Ming were overthrown when peasant rebels captured Beijing. Ming generals then opened the gates of the Great Wall to the Qing, hoping they would fight the rebels. Loyalists fled to Nanjing, where they enthroned the Prince of Fu. The Nanjing regime lasted until 1645, when the Qing captured Nanjing.