Question: The 6th Canadian Infantry Division was originally scheduled to participate in this proposed Allied plan for the invasion of Japan near the end of World War II but the plan was abandoned after the Soviet invasion of which region? 

<P0-S0> The Battle of Le Mesnil-Patry during the Second World War, was the last attack by an armoured battle group conducted by Canadian troops in Normandy in June 1944. <P0-S1>  The Queen's Own Rifles of Canada of the 8th Canadian Infantry Brigade of the 3rd Canadian Division, supported by the 6th Canadian Armoured Regiment (1st Hussars) of the 2nd Canadian Armoured Brigade attacked the village of Le Mesnil-Patry in Normandy, to advance southwards towards the higher ground of Hill 107 to the west of Cheux. <P0-S2>  The attack was intended to support a larger operation by the 50th (Northumbrian) Infantry Division and the 7th Armoured Division to capture the city of Caen and to advance in the centre of the bridgehead next to the First US Army. <P0-S3>  The battle was a German defensive success but the greater German objective of defeating the invasion by a counter-offensive also failed. <SEP> <P1-S0> Operation Atlantic (18–21 July 1944) was a Canadian offensive during the Battle of Normandy in the Second World War. <P1-S1>  The offensive, launched in conjunction with Operation Goodwood by the Second Army, was part of operations to seize the French city of Caen and vicinity from German forces. <P1-S2>  It was initially successful, with gains made on the flanks of the Orne River near Saint-André-sur-Orne but an attack by the 4th and 6th Canadian Infantry Brigades of the 2nd Canadian Infantry Division, against strongly defended German positions on Verrières Ridge to the south was a costly failure. <SEP> <P2-S0> The 6th Canadian Infantry Division was an infantry division of the Canadian Army, formed in 1942 during the Second World War. <P2-S1>  It was attached to Pacific Command. <P2-S2>  The division had a brigade sent to the Aleutian Islands Campaign, particularly at Kiska, but never saw action. <P2-S3>  The 6th Division was to have been part of a proposed Commonwealth Corps, formed for a planned invasion of Japan, but was disbanded in 1945, after the war was ended by the bombing of Hiroshima and Nagasaki. <SEP> <P3-S0> Operation Downfall was the proposed Allied plan for the invasion of Japan near the end of World War II. <P3-S1>  The planned operation was abandoned when Japan surrendered following the atomic bombings of Hiroshima and Nagasaki, the Soviet declaration of war and the Soviet invasion of Manchuria. <P3-S2>  The operation had two parts: Operations Olympic and Coronet. <P3-S3>  Set to begin in November 1945, Operation Olympic was intended to capture the southern third of the southernmost main Japanese island, Kyūshū, with the recently captured island of Okinawa to be used as a staging area. <P3-S4>  Later, in the spring of 1946, Operation Coronet was the planned invasion of the Kantō Plain, near Tokyo, on the Japanese island of Honshu. <P3-S5>  Airbases on Kyūshū captured in Operation Olympic would allow land-based air support for Operation Coronet. <P3-S6>  If Downfall had taken place, it would have been the largest amphibious operation in history.