The Germans in Poland, Netherlands, France, Britain, and in Barbarossa used strategic bombing. Italy conducted strategic bombing in the Middle East against Britain notably in Bahrain. Japan did
“terror bombing” in Chinese cities. The Soviets also did strategic bombing, but also shifted to terror bombing against Finland and Hungary to knock them out of the war.
This would then be referred to as Molotov’s bread basket… as he said that they weren’t dropping bombs but food on Helsinki