What happened September 1943 AD

On 3 September 1943, the Western Allies invaded the Italian mainland. The invasion lasted to 17 September 1943.

The Armistice of Cassibile was an armistice signed on 3 September 1943 by Walter Bedell Smith and Giuseppe Castellano, and made public on 8 September, between the Kingdom of Italy and the Allies. The armistice was approved by both King Victor Emmanuel III and Italian Prime Minister Pietro Badoglio. The armistice stipulated the surrender of Italy to the Allies.

Operation Achse which lasted from 8 to 19 September, was the code name for the German operation supported by Italian fascists to forcibly disarm the Italian armed forces after Italy's armistice with the Allies on 3 September 1943. The Germans disarmed over a million Italian troops within a matter of days, annihilating the Italian military and state.

On September 11 the Emperor ordered Sugiyama to work with the Navy to implement better military preparation and give adequate supply to soldiers fighting in Rabaul.

Mussolini was rescued by German troops from his prison in Campo Imperatore on 12 September 1943.

German special forces then rescued Mussolini, who then soon established a new client state in German-occupied Italy named the Italian Social Republic, causing an Italian civil war.

Chinese forces invaded northern Burma in late 1943 besieged Japanese troops in Myitkyina and captured Mount Song.