September 1: In Bulgaria, the Bagryanov government resigns.

September 2: Diarist Anne Frank and her family are placed on the last transport train from Westerbork to Auschwitz concentration camp, arriving 3 days later. - ¡Hola! magazine launched in Barcelona.

September 3: The Allies liberate Brussels.

September 4: The British 11th Armoured Division liberates the city of Antwerp in Belgium. - Finland breaks off relations with Germany.

September 5: The Soviet Union declares war on Bulgaria.

September 7: The Belgian government in exile returns to Brussels from London.

September 8: The first V-2 rocket attack on London takes place. - The French town of Menton is liberated from German forces.

September 9: An insurrection breaks out in Sofia.

September 12: Allied forces from Operation Overlord (in the north) and Operation Dragoon (in the south of France) link up near Dijon.

September 14: The Great Atlantic Hurricane makes landfall in the New York City area.

September 15: The Battle of Peleliu begins in the Pacific.

September 17: Operation Market Garden begins, Allied airborne landings in the Netherlands and Germany.

September 19: An armistice between Finland and the Soviet Union is signed, ending the Continuation War.

September 20: Jüri Uluots, prime minister in capacity of president of Estonia, escapes to Sweden; 2 days later, Tallinn is taken by the Red Army.

September 24: The U.S. 45th Infantry Division takes the strongly defended city of Epinal before crossing the Moselle River and entering the western foothills of the Vosges.

September 26: Operation Market Garden ends in an Allied withdrawal. - On the middle front of the Gothic Line, Brazilian troops control the Serchio valley region after 10 days of fighting.

September: Start of Dutch famine ("Hongerwinter") in the occupied northern part of the Netherlands. (source: Wikipedia)