The Croatian Military Frontier (Croatian: Hrvatska vojna krajina or Hrvatska vojna granica) was a district of the Military Frontier, a territory in the Habsburg monarchy, first during the period of the Austrian Empire and then during Austria-Hungary.

In the Frontier zone, the king-emperors promised free land and freedom of religion to people who came to the area with the majority of the population being Croats, Serbs and Vlachs.

[1][2][3][4][5] In exchange, the people who lived in the area had an obligation to fight for the Empire, and to protect the land.

The Croatian Military Frontier existed until 15 July 1881, when it was abolished and incorporated into the Kingdom of Croatia-Slavonia (like the Slavonian one).

Like the rest of the Military Frontier, it ceased to exist as a political entity in the late 19th century.