Question: On what date did the invasion that the FUSAG was created to dsitract the Germans from occur?

Context articles: Massacre of the Acqui Division
Invasion of Normandy
Pier House Museum
Operation Ironside
Battle of Crete
D-Day naval deceptions
Operation Quicksilver (deception plan)
German–Soviet Credit Agreement (1939)
German nationalism
First United States Army Group

The Massacre of the Acqui Division, also known as the Cephalonia Massacre, was the mass execution of the men of the Italian 33rd "Acqui" Infantry Division by the Germans on the island of Cephalonia, Greece, in September 1943, following the Italian armistice during the Second World War.
 About 5,000 soldiers were massacred and others drowned.
 The Italians launched their invasion of Greece in October 1940, but by November, they were pushed back into Albania, and in April 1941 the Germans had to come to their aid.
 But following the decision of the Italian government to negotiate a surrender to the Allies in 1943, the German Army tried to disarm the Italians in what they called Operation Achse.
 Between 13 and 22 September 1943, on the island of Cephalonia, the Germans fought the Italians of the 33rd "Acqui" Infantry Division.
 A total of 1,315 were killed in battle, 3,000 were drowned when the German ships taking them to concentration camps were sunk by the Allies and 5,155 were executed by 26 September.
 It was one of the largest prisoner of war massacres of the war, along with the Katyn massacre of approximately 22,000 Poles by Soviets, and it was one of many atrocities committed by the 1st Mountain Division (German: "1.
 Gebirgs Division" ) .
The Western Allies of World War II launched the largest amphibious invasion in history when they assaulted Normandy, located on the northern coast of France, on 6 June 1944.
 The invaders were able to establish a beachhead as part of Operation Overlord after a successful "D-Day," the first day of the invasion.
The Pier House Museum is a museum in Symbister, Whalsay, in the Shetland Islands of Scotland.
 The museum is located in the old Pier House, which was once the centre for trade with the Germans and the export of dried and salted fish to the Hanseatic League, an alliance of trading guilds that established and maintained a trade monopoly over much of Northern Europe between the 13th and 17th centuries.
 The Germans brought their goods, iron tools, seeds, salt and cloth to barter for dried and salted fish from the island.
 The old Hanseatic house which had been used by the Germans for several centuries until 1707, was refurbished for the museum, housing artifacts which date from the earlier trading period and providing an important insight into the economy of the Shetlands at the time.
 Architecturally it is described as "two-storeyed with crowstepped gables, and an external stone staircase."
 The house and port nearby are categorized officially as a category B Listed Building.
Operation Ironside was a Second World War military deception undertaken by the Allies in 1944.
 It formed part of Operation Bodyguard, a broad strategic deception plan instigated by the Allies throughout the year to help cover the June 1944 invasion of Normandy.
 Ironside supported the overall deception by suggesting to the Germans that the Allies would subsequently land along the Bay of Biscay.
 It complemented efforts to deceive the Germans into believing that the Allies would also land in southern France at this time (Operation Vendetta).
 Bordeaux was an important port for the German war effort and had already been a target of commando raids two years earlier.
 Ironside intended to play on German fears of an invasion in the region, with the aim of tying down defensive forces following Operation Overlord in June 1944.
The Battle of Crete (German: "Luftlandeschlacht um Kreta" , Greek: Μάχη της Κρήτης , also "Unternehmen Merkur", "Operation Mercury") was fought during the Second World War on the Greek island of Crete.
 It began on the morning of 20 May 1941, when Nazi Germany began an airborne invasion of Crete.
 Greek forces and other Allied forces, along with Cretan civilians, defended the island.
 After one day of fighting, the Germans had suffered heavy casualties and the Allied troops were confident that they would defeat the invasion.
 The next day, through communication failures, Allied tactical hesitation and German offensive operations, Maleme airfield in western Crete fell, enabling the Germans to land reinforcements and overwhelm the defensive positions on the north of the island.
 Allied forces withdrew to the south coast.
 Over half were evacuated by the British Royal Navy; the remainder surrendered or joined the Cretan resistance.
Operations Taxable, Glimmer and Big Drum were tactical military deceptions conducted on 6 June 1944 in support of the Allied landings in Normandy.
 The operations formed the naval component of Operation Bodyguard, a wider series of tactical and strategic deceptions surrounding the invasion.
 Small boats, along with aircraft from RAF Bomber Command, simulated invasion fleets approaching Cap d'Antifer, Pas-de-Calais and Normandy.
 Glimmer and Taxable played on the German belief, amplified by Allied deception efforts over the preceding months, that the main invasion force would land in the Calais region.
 Big Drum was positioned on the western flank of the real invasion force to try to confuse German forces about the scale of the landings.
 These operations complemented Operation Titanic, which was intended to confuse the Germans about the D-Day airborne forces.
Operation Quicksilver was a Second World War military deception.
 Undertaken by the Allies in 1944, the operation threatened an invasion of France in the Pas de Calais region through the simulation of a large Field Army in South East England.
 Quicksilver formed part of the Operation Fortitude deception, itself part of the strategic Operation Bodyguard plan.
 The key element of Quicksilver was the creation in German minds that "First United States Army Group" (FUSAG) commanded by General George Patton supposedly would land in the Pas-de-Calais for the major invasion of Europe, after the landings in Normandy had lured the German defenders to that front.
 (FUSAG was a genuine army group headquarters which later became Omar Bradley's 12th Army Group, but was given a fictitious role and many non-existent divisions for purposes of deception.)
The German–Soviet Credit Agreement (also referred to as the German–Soviet Trade and Credit Agreement) was an economic arrangement between the Soviet Union and Nazi Germany whereby Soviet Union received an acceptance credit of 200 million Reichsmark.
 over 7 years with an effective interest rate of 4.5 percent.
 The credit line was to be used during the next two years for purchase of capital goods (factory equipment, installations, machinery and machine tools, ships, vehicles, and other means of transport) in Germany and was to be paid off by means of Soviet material shipment from 1946 onwards.
 The economic agreement was the first step toward improvement in relations between the Soviet Union and Germany.
 The next day after the Credit Agreement, the Soviet Union went to war against Japan, in a successful four-week military campaign in the Far East.
 The Nazi-Soviet Pact was signed four days after the Credit Agreement.
 The 1939 German–Soviet Commercial Agreement renewed declined Nazi–Soviet economic relations and was adjusted and expanded with the larger German–Soviet Commercial Agreement in February 1940 and January 1941 German–Soviet Border and Commercial Agreement.
 German shipments to the Soviets became tardy and failed to provide all that was promised the closer the date of Barbarossa came.
 The Soviets fulfilled their obligations to the letter right up until the invasion, wanting to avoid provoking Germany.
 All these agreements were terminated when Germany invaded the Soviet Union in June 1941, in violation of the treaties between the two countries.
 Soviet trade with Germany in the pre-invasion period ended up providing the Germans with many of the resources they needed for their invasion of the Soviet Union.
German nationalism is the nationalist idea that Germans are a nation, promotes the unity of Germans into a nation state, and emphasizes and takes pride in the national identity of Germans.
 The earliest origins of German nationalism began with the birth of romantic nationalism during the Napoleonic Wars when Pan-Germanism started to rise.
 Advocacy of a German nation state began to become an important political force in response to the invasion of German territories by France under Napoleon.
First United States Army Group (often abbreviated FUSAG) was a fictitious (paper command) Allied Army Group in World War II prior to D-Day, part of Operation Quicksilver, created to deceive the Germans about where the Allies would land in France.
 To attract Axis attention, prominent US general George S. Patton was placed in command of the fabricated formation.