The Second World War caused many governments to lose sovereignty as their territories came under occupation by enemy powers.
Governments in exile sympathetic to the Allied or Axis powers were established away from the fighting.
Most belonged to Axis-sponsored puppet regimes whose territory came under Allied occupation late in the war.
In the aftermath of the occupation of the Baltic states by the Soviet Union, all three republics established some form of government in exile.
These exiled regimes were operating at the start of World War II and involved themselves in the conflict to varying degrees.