List the events in order 1. Pearl Harbor Bombing 2. Bombing of Japan 3. Invasion of Poland 4. Battle of Stalingrad

3. Invasion of Poland was on 1939

1. Pearl Harbor was December 7, 1941

For Bombing of Japan, are you referring to the Doolitle Raid, or the Atomic Bombs and Firebombings on 1945?

If we're talking about the Atomic Bombs/Firebombings, then

4. Battle of Stalingrad started in August 1942

2. Bombing of Japan is in 1944-1945

If we include the Doolitle Raid,

Then 2 goes first, followed by 4.