Slavko Kvaternik (25 August 1878 – 7 June 1947) was a Croatian military general and politician who was one of the founders of the ultranationalist Ustaše movement.

After the collapse of Austria-Hungary, he was appointed by the National Council of the State of Slovenes, Croats and Serbs to lead a successful incursion into Međimurje in late 1918.

[2] At the end of August 1941, Olga Frank committed suicide, probably because of her Jewish origins and the roles of her husband, and (especially) of her son Dido, in the NDH.

[2] Educated in a military academy, Kvaternik served in the Austro-Hungarian Army during World War I, and was awarded the German Iron Cross 1st Class (1918).

[4] After the German invasion of the Kingdom of Yugoslavia on 6 April 1941, the Ustaše formed their government with Ante Pavelić as leader.

Four days later Kvaternik proclaimed the establishment of the Independent State of Croatia (NDH) and formed the first Ustasha government.