Question: Which operation was this military offensive, which put an end to the conflicts between Lithuanian and Polish units known as Dubingiai massacre, a part of?
Sentence (from "Vilnius Offensive"): The Vilnius Offensive (Russian: Вильнюсская наступательная операция ) occurred as part of the third phase of Operation Bagration, the great summer offensive by the Red Army against the "Wehrmacht" in June and July, 1944.
Relevant evidence: Yes