| Reason for Change | Former Country | Year the Country Ended |
|---|
| Became part of the Union of South Africa | |
| Became part of the Union of South Africa | |
| Split into two Scandinavian countries | |
| Absorbed by the Japanese Empire | |
| Republic of China established, Mongolia declares nominal independence | |
| Joined Greece | |
| Became the Weimar Republic, lost much territory to the new state of Poland | |
| Divided into multiple central European countries | |
| Annexed by Belgium | |
| Turned into a Soviet Socialist state, in central Asia | |
| Defeated by the British, in modern Somalia | |
| Conquered by the Soviet Union, in central Asia | |
| Resulted from the Partition of Ireland, which resulted in the loss of most of Ireland for this country | |
| Sultanate abolished, Republic of Turkey formed | |
| Rejoined Spanish Morocco | |
| Given to Italy after the death of the monarch | |
| Conquered by Nazi Germany, later incorporated into the People's Republic of Poland | |
| Annexed by the Soviet Union, in Southern Siberia | |
| Empire was dissolved, and the homeland was divided into various allied zones of control | |
Countries of Africa 
Countries of Asia 
Countries of North America
