1. Alsace-Lorraine: Alsace-Lorraine had been annexed by Germany after the Franco-Prussian War of 1871. Following World War I, it was briefly returned to France but was reoccupied by Germany during World War II. France regained Alsace-Lorraine at the end of World War II and incorporated it back into its territory.
2. Corsica: Corsica is an island located in the Mediterranean Sea and is part of France today. During World War II, both Nazi Germany and Fascist Italy briefly occupied Corsica but were later driven out by Allied forces, leading to France resuming control of the island.
3. Nice and Savoy: Following the Second World War, the regions of Nice and Savoy, which formerly belonged to Italy, were ceded to France under the terms of the 1947 Paris Peace Treaty.
It's important to note that France also controlled several colonies and overseas territories during and after World War II, particularly in Africa and Southeast Asia.