Query: In what year was the South Pacific Mandate created?
Context: However, Spain sold the islands to the German Empire in 1884, and they became part of German New Guinea in 1885. In World War I the Empire of Japan occupied the Marshall Islands, which in 1919 the League of Nations combined with other former German territories to form the South Pacific Mandate. In World War II, the United States conquered the islands in the Gilbert and Marshall Islands campaign.