Question: Battle of Tarawa and Operation Overlord, occurred during which event?

Context paragraphs:
Operation Overlord: Operation Overlord was the codename for the Battle of Normandy, the Allied operation that launched the successful invasion of German-occupied Western Europe during World War II.  The operation was launched on 6 June 1944 with the Normandy landings (Operation Neptune, commonly known as D-Day).  A 1,200-plane airborne assault preceded an amphibious assault involving more than 5,000 vessels.  Nearly 160,000 troops crossed the English Channel on 6 June, and more than two million Allied troops were in France by the end of August.

Battle of Tarawa: The Battle of Tarawa was a battle in the Pacific Theater of World War II that was fought on 20–23 November 1943.  It took place at the Tarawa Atoll in the Gilbert Islands, and was part of Operation Galvanic, the U.S. invasion of the Gilberts.  Nearly 6,400 Japanese, Koreans, and Americans died in the fighting, mostly on and around the small island of Betio, in the extreme southwest of Tarawa Atoll.

American airborne landings in Normandy: The American airborne landings in Normandy were the first American combat operations during Operation Overlord, the invasion of Normandy by the Western Allies on June 6, 1944, during World War II.  Around 13,100 American paratroopers of the 82nd and 101st Airborne Divisions made night parachute drops early on D-Day, June 6, followed by 3,937 glider troops flown in by day.  As the opening maneuver of Operation Neptune (the assault operation for Overlord) the two American airborne divisions were delivered to the continent in two parachute and six glider missions.

Tarawa: Tarawa is an atoll and the capital of the Republic of Kiribati, in the central Pacific Ocean.  It comprises North Tarawa, which has much in common with other, more remote islands of the Gilberts group; and South Tarawa, which is home to 50,182 as of 2010 – half of the country's total population.  The atoll is best known by outsiders as the site of the Battle of Tarawa during World War II.

USS Tarawa (CV-40): USS "Tarawa" (CV/CVA/CVS-40, AVT-12) was one of 24 "Essex"-class aircraft carrier s built during and shortly after World War II for the United States Navy.  The ship was the first US Navy ship to bear the name, and was named for the bloody 1943 Battle of Tarawa.  "Tarawa" was commissioned in December 1945, too late to serve in World War II.  After serving a short time in the Far East, she was decommissioned in 1949.  She was soon recommissioned after the Korean War began, serving in the Atlantic as a replacement for carriers sent to Korea.  In the early 1950s, she was redesignated an attack carrier (CVA) and then an antisubmarine warfare carrier (CVS).  Except for one tour in the Far East, she spent her entire second career operating in the Atlantic and Caribbean.  Consequently, "Tarawa" was the only ship of her class to never see combat action.

Overlord (film): Overlord is a 1975 black-and-white film written and directed by Stuart Cooper.  Set around the D-Day invasion ('Operation Overlord'), "Overlord" is a war film about a young soldier's meditations on being part of the war machinery, and his premonitions of death.  The film was entered into the 25th Berlin International Film Festival, where it won the Silver Bear - Special Jury Prize.

Operation Totalize: Operation Totalize (also spelled Operation Totalise in recent British sources) was an offensive launched by Allied troops in the First Canadian Army during the later stages of Operation Overlord, from 8 to 9 August 1944.  The intention was to break through the German defences south of Caen on the eastern flank of the Allied positions in Normandy and exploit success by driving south, to capture the high ground north of the city of Falaise.  The goal was to collapse the German front and cut off the retreat of German forces fighting the Allied armies further west.  The battle is considered the inaugural operation of the First Canadian Army, which had been activated on 23 July.

Operation Perch: Operation Perch was a British offensive of the Second World War which took place from 7 to 14 June 1944, during the early stages of the Battle of Normandy.  The operation was intended to encircle and seize the German occupied city of Caen, which was a D-Day objective for the British 3rd Infantry Division in the early phases of Operation Overlord.  Operation Perch was to begin immediately after the British beach landings with an advance to the south-east of Caen by XXX Corps.  Three days after the invasion the city was still in German hands and the operation was amended.  The operation was expanded to include I Corps for a pincer attack on Caen.

Operation Bolero: Operation Bolero was the commonly used reference for the code name of the United States military troop buildup in the United Kingdom during World War II in preparation for the initial cross-channel invasion plan known as Operation Roundup, to be implemented in mid-1943, or for its lesser contingency alternative, Operation Sledgehammer, to be executed in the fall of 1942 in the event of German setbacks or to ease Axis pressure on the Eastern Front.  ("Bolero" was the code name used in official communications to stand in for "United Kingdom" when describing the theater or movements.)  What later became the Bolero plan – the buildup of a strategic air force in Great Britain in preparation for Roundup – was first submitted by Commanding General of the U.S. Army Air Forces, Henry H. Arnold, to General George Marshall, the U.S. Army Chief of Staff, on April 12, 1942, and set in motion a huge movement of men and material that laid the groundwork for Operation Overlord.

Operation Charnwood: Operation Charnwood was an Anglo-Canadian offensive that took place from 8 to 9 July 1944, during the Battle for Caen, part of the larger Operation Overlord (code-name for the Battle of Normandy), in the Second World War.  The operation was intended to at least partially capture the German-occupied city of Caen (] ), which was an important objective for the Allies during the opening stages of Overlord.  It was also hoped that the attack would forestall the transfer of German armoured units from the Anglo-Canadian sector to the lightly screened American sector, where a major American offensive was being planned.  The British and Canadians advanced on a broad front and by the evening of the second day had taken Caen up to the Orne and Odon rivers.

Supporting paragraphs: Battle of Tarawa Operation Overlord
Answer: World War II