What event was Mussolini arrested after?

In October Mussolini ordered an attack on Greece, which resulted in the lost of 1/3 of Albania until Hitler assisted in the attack on Greece. In June of 1941 Mussolini then declared war on the Soviet Union as well as a declaration of war on the United States in December. The Italians were defeated time and time again and this had most people turning against Mussolini. On July 25, 1943 King Vittorio Emanuele III summoned Mussoloni to his palace and notified him that he would no longer have any power. Mussolini was then arrested and kept in isolation in Central Italy.