Answer
The civil war in Hungary lasted 6 years after Béla IV ceded territories to Stephen in the early 1260s. The war began when Stephen, the younger brother of King Béla IV, rebelled against him. Stephen was supported by the Hungarian nobles, while Béla was supported by the Church and the Teutonic Knights. The war ended in 1266 when Béla IV was forced to cede more territories to Stephen.