The Petlyakov Pe-2 was a Soviet dive bomber used during the Second World War. The Pe-2 was fast and maneuverable yet durable, and was manufactured in large numbers. It became known by the NATO reporting name Buck. The Finnish Air Force serial code was PE- and unofficial nickname Pekka-Eemeli.

The Pe-2 quickly proved itself to be a highly capable aircraft, capable of eluding the Luftwaffe’s interceptors and allowing their crews to develop accuracy with their bombing. Throughout 1942, the design was steadily refined and improved, in direct consultation with pilots who were actually flying them in combat.

During the Continuation War Finland purchased six war Pe-2 aircraft from Germany. These arrived to State Aircraft Factory facilities at Harmala in January 1942, where the airframes were overhauled and given Finnish serial numbers. It was initially planned to use these planes as dive bombers in the 1^st flight of LeLv 48, which began to receive its aircraft in July 1942. The role of the Pe-2s was changed to fly long-range photographic and visual reconnaissance missions for the Army General Headquarters. Three Pe-2s were lost in accidents or technical failure during the Continuation War, one was destroyed in bombing of Lappeenranta airfield, one was shot down by Soviet fighters and one went missing in action. In the Lapland War the only remaining machine flew a single reconnaissance sortie in October 1944.