 The political situation deteriorated further as Radić was assassinated in the National Assembly in 1928, leading to the dictatorship of King Alexander in January 1929.The dictatorship formally ended in 1931 when the king imposed a more unitarian constitution, and changed the name of the country to Yugoslavia.The HSS, now led by Vladko Maček, continued to advocate federalisation of Yugoslavia, resulting in the Cvetković–Maček Agreement of August 1939 and the autonomous Banovina of Croatia.