Complex sentence: In this atmosphere of national humiliation and resentment, the nation's first efforts at modern democracy failed, and in March 1919, a Communist cadre seized power and installed their leader, Béla Kun, as premier of a new Hungarian Soviet Republic.
Split into simpler sentences: In this atmosphere of national humiliation and resentment, the nation's first efforts at modern democracy failed. In March 1919, a Communist cadre seized power and installed their leader, Béla Kun, as premier of a new Hungarian Soviet Republic.