How did mussolini use the fear of communism to rise in power

In 1922 October, there were extensive  riots in the rural countryside of Northern Italy and there was widespread fear of a communism takeover during these riots, which  King Victor Emmanuel III of Italy was not happy about.

Mussolini gathered his Fascist followers and foot soldiers known as the "Black shirts" and staged a march on Rome. Once there, King Victor asked him to form a government and restore order in the countryside. Over the next three years, Mussolini dismantled the democracy that prevailed at the time and in 1925 declared himself a dictator of Italy giving himself the title " Duce" which means "The Leader."

disease was the number one killer of native peoples. they had had little exposure to the diseases of europe. this led to some villages being almost completely wiped out and some tribes destroyed.