Kaiser-Wilhelmsland was a German colonial territory located in the northeastern part of New Guinea. Established in the late 19th century, it was named after the German Emperor Wilhelm II. The region was primarily focused on resource extraction, including copra and rubber, and was administered by the German Empire until World War I. After Germany's defeat in 1918, Kaiser-Wilhelmsland was ceded to Australia under the terms of the Treaty of Versailles. The territory was then incorporated into the Australian-administered Territory of New Guinea, marking the end of German colonial rule in the area.