Why is midway, alamein, and stalingrad considered turning points in the world? explain with good but little detail:))

The Battle of Midway, which resulted in the loss of four Japanese Aircraft Carriers, was the first major defeat for the Empire of Japan, and was the farthest their forces would advance in the Pacific.  From 1942 on, there would be campaign after campaign aimed at "island hopping" back towards to the Japanese home islands.