1943 significant event World War II
June
June 1 – BOAC Flight 777, a scheduled passenger flight, is shot down over the Bay of Biscay by German Junkers Ju 88s; all 17 persons aboard perish, including actor Leslie Howard.
June 3
The Zoot Suit Riots erupt between military personnel and Mexican-American youths in East Los Angeles.
The French Committee of National Liberation (Comité Français de Libération Nationale, CFLN) is formed with headquarters in Algiers and Generals Charles de Gaulle and Henri Giraud as co-presidents.
June 4 – A military coup d'état in Argentina ousts Ramón Castillo.
June 8 – WWII: Japanese battleship Mutsu is destroyed by an accidental magazine explosion, in Hashirajima anchorage.
June 8–9 – WWII: Battle of Porta: The Royal Italian Army is defeated by the Greek People's Liberation Army.
June 20–23 – The Detroit race riot of 1943 in the United States kills 34 people (25 African Americans, 9 whites), wounds hundreds more and damages and destroys property worth millions.
June 21 – WWII: As part of Operation Animals, British Special Operations Executive saboteurs destroy the railway bridge over the Asopos River in "Operation Washing", and guerrillas of the Greek People's Liberation Army ambush and destroy a German convoy at the Battle of Sarantaporos.
June 22 – WWII: The U.S. Army 45th Infantry Division lands in North Africa, prior to training at Arzew, French Morocco.
June 30
The United States Civilian Conservation Corps is abolished.
WWII: The New Georgia campaign begins in the Solomon Islands, an Allied offensive against the Japanese forces stationed there.
June (late) – The Holocaust: The last trainload of Jewish prisoners is moved from Bełżec extermination camp in Occupied Poland (for gassing at Sobibór), and for the remainder of the year the Nazis make efforts to obliterate the site.July
July 1 – The United States Women's Army Corps (WAC) is converted to full status.
July 4 – 1943 Gibraltar B-24 crash: The aircraft carrying General Władysław Sikorski, Prime Minister of the Polish government-in-exile, crashes, killing him and 15 others, leading to a lasting controversy over the circumstances.
July 5 – WWII:
Nazi Germany commences Operation Citadel. It will eventually lead to the Battle of Kursk, the largest tank battle in history.
A fleet sets sail for the Allied invasion of Sicily.
The National Bands Agreement is concluded in Greece.
July 6 – WWII: Americans and Japanese fight the Battle of Kula Gulf off Kolombangara.
July 10
(0245 GMT (4:45 a.m. local time)) – WWII: Allied invasion of Sicily – The Allied invasion of Axis-controlled Europe begins, with landings on the island of Sicily off mainland Italy by the Seventh United States Army and the British Eighth Army, including the 1st Canadian Infantry Division.
The Holocaust: Jedwabne pogrom – At least 340 Polish Jews are marched to a local barn, locked inside and subsequently burned to death.
July 11 – WWII:
United States Army forces make an assault on Piano Lupo, just outside Gela, Sicily.
Massacres of Poles in Volhynia and Eastern Galicia by the Ukrainian Insurgent Army within the Reichskommissariat Ukraine (Volhynia) peak.
July 12 – WWII: Main engagement of the Battle of Prokhorovka – The Wehrmacht and the Red Army fight to a draw in one of the largest tank battles in military history.
July 19 – WWII: Rome is bombed by the Allies, for the first time in the war.
July 24 – WWII: Operation Gomorrha: British and Canadian aeroplanes bomb Hamburg by night; American planes bomb the city by day. By the end of the operation in November, 9,000 tons of explosives will have killed more than 42,000 people and destroyed 280,000 buildings.July 25 – Benito Mussolini, Fascist Prime Minister of Italy since 1922, is arrested after the Grand Council of Fascism withdraws its support. "Il Duce" is replaced by General Pietro Badoglio.November
November 1 – WWII: Operation Goodtime: United States Marines land on Bougainville Island in the Solomon Islands.
November 2 – WWII:
Battle of Empress Augusta Bay off Bougainville Island: American and Japanese ships fight to a draw.
WWII: British troops in Italy reach the Garigliano River.
November 3–4 – The Holocaust: Aktion Erntefest ("Operation Harvest Festival") – The largest single day massacre of Jews in the entire war takes place when over 43,000 Jews are shot-gunned to death by the SS, the Ordnungspolizei and the "Trawniki men" (Ukrainian collaborators) in Sonderdienst formations at the Majdanek, Trawniki and Poniatowa concentration camps in the General Government territory of occupied Poland.
November 5 – WWII: First Bombing of the Vatican – Four bombs are dropped on the neutral Vatican City; the aircraft responsible is never certainly identified.
November 6 – WWII: The Ukrainian capital of Kiev is liberated by Soviet forces  from its German occupiers as part of the Battle of Kiev.
November 9 – An agreement for the foundation of the United Nations Relief and Rehabilitation Administration is signed by 44 countries in the White House, Washington, D.C.
November 10 – The Lübeck martyrs, four men of religion, are executed for supposedly treasonable views.
November 14 – Leonard Bernstein, substituting at the last minute for ailing principal conductor Bruno Walter, directs the New York Philharmonic in its regular Sunday afternoon broadcast concert, over CBS Radio. The event receives front-page coverage in The New York Times the following day.
November 15 – Porajmos: German SS leader Heinrich Himmler orders that Gypsies be put "on the same level as Jews and placed in Nazi concentration camps."
November 16 – WWII:
After flying from Britain, 160 American bombers strike a hydro-electric power facility and heavy water factory in German-controlled Vemork, Norway.
A Japanese submarine sinks the surfaced U.S. submarine USS Corvina, near Chuuk Lagoon (Truk).
November 18 – WWII: Battle of Berlin – The British Royal Air Force opens its bombing campaign against Berlin with 440 planes, causing only light damage and killing 131. The RAF loses 9 aircraft and 53 aviators.
November 19 – The Holocaust: Inmates of Janowska concentration camp, near Lwów (at this time in German-occupied Poland), stage a failed uprising, after which the SS liquidates the camp, resulting in at least 6,000 deaths.
November 20 – WWII: Battle of Tarawa: United States Marines land on Tarawa and Makin atolls in the Gilbert Islands (Kiribati from 1979) and take heavy fire from Japanese shore guns.
November 22–26 – WWII: Cairo Conference ("Sextant") – President of the United States Franklin D. Roosevelt, Prime Minister of the United Kingdom Winston Churchill and Chairman of the National Government of China Chiang Kai-shek meet at Cairo, Egypt, to discuss ways to defeat Japan in the Pacific War.
November 22 – Lebanon gains independence, upon the ending of the French Mandate.
November 23 – The Deutsches Opernhaus on Bismarckstraße, in the Berlin district of Charlottenburg, is destroyed in an air raid (it is reopened in 1961, as the Deutsche Oper Berlin).
November 25 – WWII: Americans and Japanese fight the naval Battle of Cape St. George, between Buka and New Ireland.
November 26 – WWII: British troopship HMT Rohna is sunk off the north African coast by a Luftwaffe Henschel Hs 293 radio controlled glide bomb, killing 1,015.
November 27 – The 1943 Tosya–Ladik earthquake in Turkey kills thousands.
November 28 – WWII: Tehran Conference: U.S. President Franklin D. Roosevelt, British Prime Minister Winston Churchill and Soviet leader Joseph Stalin meet in Tehran, to discuss war strategy. On November 30, they establish an agreement concerning a planned June 1944 invasion of Europe, codenamed Operation Overlord.
November 29 – The second session of AVNOJ, the Anti-Fascist Council of National Liberation of Yugoslavia, is held in Jajce, Bosnia and Herzegovina, to determine the post-war ordering of the country.