1916 to 1924: U.S. Marines occupied the Dominican Republic following 28 revolutions in 50 years.[18] The Marines ruled the nation completely except for lawless parts of the city of Santo Domingo, where warlords still held sway.[19] 1899 to 1901: The U.S. organized the China Relief Expedition during the Boxer Rebellion, which saw an eight-nation alliance put down a rebellion by the Boxer secret society and toppled the Qing dynasty's Imperial Army.