France conducts the Oreste nuclear test as 14th in the group of 29, 1975–78 French nuclear tests series.

France, officially the French Republic, is a country primarily located in Western Europe. Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the North Atlantic, the French West Indies, and many islands in Oceania and the Indian Ocean, giving it one of the largest discontiguous exclusive economic zones in the world. Metropolitan France shares borders with Belgium and Luxembourg to the north; Germany to the northeast; Switzerland to the east; Italy and Monaco to the southeast; Andorra and Spain to the south; and a maritime border with the United Kingdom to the northwest. Its metropolitan area extends from the Rhine to the Atlantic Ocean and from the Mediterranean Sea to the English Channel and the North Sea. Its eighteen integral regions—five of which are overseas—span a combined area of 632,702 km² (244,288 sq mi) and have an estimated total population of over 68.6 million as of January 2025. France is a semi-presidential republic. Its capital, largest city and main cultural and economic centre is Paris.

The 1975–1978 nuclear test series was a group of 29 nuclear tests conducted by France in 1975–1978. These tests followed the 1971–1974 French nuclear tests series and preceded the 1979–1980 French nuclear tests series.