There was a Soviet fighter aircraft flying, fighting with Nazis enemies, but once he was shot and fell into a lake.

After more than 60 years, historians found this place and lifted the aircraft from the lake (surprisingly enough, but the aircraft was well preserved). They buried the pilot and even found canned pork.

Note: this is a U.S. fighter aircraft P-39 Airacobra. It was used during the Second World War with mediocre performance by the Americans in the Pacific, then with a great effectiveness by the French in North Africa and Italy and especially by the Soviets (who received the majority of the production).