During World War II, Slovakia was a client state of Nazi Germany and a member of the Axis powers. It participated in the war against the Soviet Union and deported most of its Jewish population.

On 23 March 1939, Hungary, having already occupied Carpatho-Ukraine, attacked from there, and the newly established Slovak Republic was forced to cede 1,697 square kilometres (655 sq mi) of territory with about 70,000 people to Hungary before the onset of World War II.

The Holocaust in Slovakia was the systematic dispossession, deportation, and murder of Jews in the Slovak Republic, a client state of Nazi Germany, during World War II. Out of 89,000 Jews in the country in 1940, an estimated 69,000 were murdered in the Holocaust.

Learn more about Slovakia during World War II, its alliance with Nazi Germany, and its involvement in the Holocaust.

The Slovak National Uprising allowed Slovaks to side with the victors of World War II, even though, for most of the war, the regime collaborated with Nazi Germany. The uprising changed numerous national narratives to ones of victimhood, martyrdom, and resilience.

In the spring of 1939, Nazi Germany finally dismantled a weakened Czechoslovakia, after it was abandoned by the Western powers. While German forces occupied Bohemia and Moravia, well nigh without...

Slovakia was the only Axis-Allied Nation to take part in the campaign against Poland. With the impending German invasion of Poland slated for September of 1939, OHW requested the assistance of Slovakia.

Emerging from the dissolution of Czechoslovakia, the Slovak Republic's journey during the Second World War was marked by political upheaval, military alliances, and significant internal strife.

The (First) Slovak Republic (Slovak: [Prvá] Slovenská republika), also called the Slovak State (Slovenský štát), was a partially-recognised client state of Nazi Germany which existed in Central Europe between 14 March 1939 and 4 April 1945.

The Battle of the Dukla Pass, also known as the Dukla, Carpatho–Dukla, Rzeszów–Dukla, or Dukla–Prešov offensive, was the battle for control over the Dukla Pass on the border between Poland and Slovakia on the Eastern Front of World War II between Nazi Germany and the Soviet Union in September–October 1944.