The (First) Slovak Republic (Slovak: [prvá] Slovenská republika) otherwise known as the Slovak State (Slovak: Slovenský štát) was a client state of Nazi Germany which existed between 14 March 1939 and 4 April 1945. It controlled the majority of the territory of present-day Slovakia, but without its current southern and eastern parts, which had been ceded to Hungary in 1938. The Republic bordered Germany, the Protectorate of Bohemia and Moravia, Poland – and subsequently the General Government (German-occupied remnant of Poland) – and Hungary.

Germany recognized the Slovak State, as did several other states, including the Provisional Government of the Republic of China, Croatian State, Serbian State, El Salvador, Estonia, Italy, Hungary, Japan, Lithuania, Manchukuo, Mengjiang, Romania, the Soviet Union, Spain, Switzerland, and the Vatican City. The majority of the Allies of World War II never recognized the existence of Slovak state. The only exception was Soviet Union who nullified its recognition after Slovakia joined the invasion of the USSR in 1941.

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