League of Nations Mandate System

Class A Mandate (Former Ottoman Territories):
-Mesopotamia (United Kingdom)
-Palestine (United Kingdom)
-Syria (France)

Class B Mandates (Former German Territories in Africa):
-Ruanda-Urundi (Belgium)
-Tanganyika (United Kingdom)
-Kamerun (Split Between French and UK)
-Togoland (Split Between French and UK)

Class C Mandates (South-West Africa & Pacific Islands))
-Former German New Guinea (Australia & UK)
-Nauru (Australia)
-South Pacific Mandate (Japan)
-South-West Africa (UK and South Africa)

Source: Wikipedia (not sorry)