Which of the following was not one of Joseph Stalin's ten blows during World War II?

The story behind the answer

Vistula–Oder Offensive was not one of Stalin’s “ten blows” because that label referred specifically to a sequence of major Red Army offensives in 1944; Vistula–Oder occurred in January–February 1945 as the rapid push from the Vistula to the Oder on the road to Berlin. In contrast, Operation Bagration, the Crimean Offensive, and the Leningrad–Novgorod Offensive were all part of the 1944 list.

The “Ten Stalinist Blows” was a propaganda term from Stalin’s November 1944 speech celebrating coordinated offensives that shattered the Wehrmacht: Bagration destroyed Army Group Centre, Leningrad–Novgorod finally lifted the siege, and the Crimean Offensive expelled Axis forces from the peninsula. Memory tip: “Ten in ’44”—if an operation happened in 1945 (like Vistula–Oder), it wasn’t one of the ten.