World War II Timeline By smertz 1922 Benito Mussolini rises to power in Italy Jul 25, 1937 Battleship Vittorio Veneto is put into Commision in the Italian Royal Navy Jun 10, 1940 Italy declares war on France and Great Britain, officially entering WW2. Period: Jan 26, 1941 to Jan 31, 1941 Battle of Agordat 1943 The 205 Veltro was It was the most respected plane in the Italian fleet Period: Feb 8, 1943 to 1943 Operation Achse Period: Mar 23, 1943 to May 2, 1943 Second Battle of the Alps Period: Sep 3, 1943 to Sep 17, 1943 Allied invasion of Italy Apr 28, 1945 Benito Mussolini Dies Feb 10, 1947 Treaty of Peace with Italy Italy signed a peace treaty between Italy and Victorious Powers.