Top 10 Events Involving Italy in World War II By 23kilguscc 1939 Pact Of Steel is Signed in May of 1939 Pact of Steel was signed by Adolf Hitler and Benito Mussolini to create an agreement between Italy and Germany. 1940 Italy Declares War on Britain and France 1943 Italy Declares War on Germany Italy rejoins the war and declares war on Germany. 1945 Gen. Dwight Eisenhower Announces the Surrender of Italy to the Allies