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From what I can find it was April 5th, 1945 but that is from diaries of soldiers that fought there.
Germany was forced to pay the Allied Powers and accept blame for the war (apex)
France, Germany, and Poland
Very few aircraft were shot down by the US Navy and some people think naught but one was shot down and I do believe the it was a German aircraft recorded as being Fw 200 condor shot down by a Convoy of ships Including and that convoy contained a American destroyer.
Ask at your local American Legion hall or VFW post. Michael Montagne