Which of the listed events might be considered a turning point for the allies?

One significant turning point for the Allies during World War II was the Battle of Stalingrad, which took place from 1942 to 1943. This battle marked the first major defeat of the German army, halting their advance into the Soviet Union and boosting Allied morale. Additionally, the successful D-Day landings in June 1944 opened up a new front in Western Europe, further shifting the momentum in favor of the Allies. Both events significantly contributed to the eventual defeat of Axis powers.