Originally Posted by silent driller
In the North African Theatre- definitely El Alemein
In the Pacific Theatre- the victory at Iwo Jima
In the European Theatre- the German loss at Stalingrad
The North African Theatre by itself, did not have any influence whatsoever over the outcome of the War in Europe, whereas Stalingrad changed the entire outcome.
Iwo Jima was indeed a major victory for the US in the Pacific Theatre, but still it did not have the impact of Stalingrad.