German East Africa was a German colony in the African Great Lakes region, which included present-day Burundi, Rwanda, the Tanzania mainland, and the Kionga Triangle, a small region later incorporated into Mozambique. GEA's area was 994,996 km2 (384,170 sq mi), which was nearly three times the area of present-day Germany and almost double the area of metropolitan Germany at the time.

Carl Peters was a German explorer and colonial administrator. He was a major promoter of the establishment of the German colony of East Africa and one of the founders of the German East Africa Company. He was a controversial figure in Germany for his views and his brutal treatment of native Africans, which ultimately led to his dismissal from government service in 1897.