Complex sentence: In October 1922 the Blackshirts of the National Fascist Party attempted a coup (the "March on Rome") which failed but at the last minute, King Victor Emmanuel III refused to proclaim a state of siege and appointed Mussolini prime minister.
Split into simpler sentences: In October 1922 the Blackshirts of the National Fascist Party attempted a coup (the "March on Rome"). The coup itself was a failure, but at the last minute king Victor Emmanuel III refused to proclaim the state of siege and appointed Mussolini prime minister.