German New Guinea (German: Deutsch-Neuguinea) consisted of the northeastern part of the island of New Guinea and several nearby island groups, and was part of the German colonial empire. The mainland part of the territory, called Kaiser-Wilhelmsland, became a German protectorate in 1884. Other island groups were added subsequently. The Bismarck Archipelago (New Britain, New Ireland and several smaller islands), and the North Solomon Islands were declared a German protectorate in 1885. The Caroline Islands, Palau, and the Mariana Islands (except for Guam) were bought from Spain in 1899. German New Guinea annexed the formerly separate German Protectorate of Marshall Islands, which also included Nauru, in 1906. German Samoa, though part of the German colonial empire, was not part of German New Guinea.
Following the outbreak of World War I in 1914, Kaiser-Wilhelmsland and nearby islands fell to Australian forces, while Japan occupied most of the remaining German possessions in the Pacific. The mainland part of German New Guinea (Kaiser-Wilhelmsland), the Bismarck Archipelago and the North Solomon Islands are now part of Papua New Guinea. The Northern Mariana Islands are an unincorporated territory of the United States. The Carolines (as the Federated States of Micronesia), the Marshall Islands, Nauru and Palau are independent countries.