Western Allied invasion of Germany and Operation Undertone, occurred during which event?
Operation Undertone Operation Undertone was a large assault by the U.S. Seventh and French 1st Armies of the U.S. Sixth Army Group as part of the Allied invasion of Germany in March 1945 during World War II.
Operation Clarion Operation Clarion was the extensive Allied campaign of Strategic bombing during World War II which attacked 200 German communication network targets to open Operation Veritable/Grenade.