It was Operation Overlord. D-Day was the first day.
Operation Overlord began on D-Day 6th June 1944 with the Normandy landings.
Operation Barbarossa
Operation Barbarossa .
Operation Barbarossa
Operation Barbarossa was the German code name for their attack into Russia, which was launched on Sunday 22 June 1941.
Hitler's attack on the Soviet Union was called Operation Barbarossa
That was Operation Earnest Will, -to protect Kuwaiti and US tankers from attack.
Operation Z was the Japanese name for what it referred to as the Hawaii Operation or, as the United States called it, the attack on Pearl Harbor. During the Russo-Japanese war Admiral Togo called the attack on Russian ships Operation Z and flew a Z flag during battle. This flag was flown from the Japanese Flagship during the attack on Pearl Harbor.
Operation Barbarossa
Operation Barbarossa was the German attack plan for the attack on the Soviet Union.
The Japanese launch code was "Tora Tora Tora" Tora translates into "tiger" in English.
Operation Cobra was the military name for an offensive attack by the United States after D-Day. This operation took place in Normandy and was intended to weaken German forces in the country.