If you know anything about WWII, you know about the Battle of Midway. It was a turning point in the Pacific theater and a must win battle for the Americans.
Without a victory at Midway, the war against Japan would have been much more prolonged and the outcome would not have been certain.
The Battle of Midway occurred at a small US airbase located on the Midway atoll. Japanese forces planned to attack the atoll and quickly overwhelm the defenses. They could then build an air base and await the US aircraft carrier forces whom would surely arrive.
Their goal, to take the atoll and then destroy the US carrier fleet. What would happen would be much different however.
American intelligence was able to intercept communications that revealed the plan. This would give them time to not only prepare for the defense of the island, but plan an ambush of the Japanese fleet. They positioned their own carrier force in a position to intercept Japanese forces.
On June 4 of 1942, the ambush was sprung and the US forces were able to knock out 3 Japanese aircraft carriers while losing 1 themselves. The atoll’s air base, although slightly damaged would survive the attack as well.
The Battle of Midway was a turning point in the war. Before the battle, Japan dominated the Pacific theater. They had a superior fleet and with their carriers, superior air power. After the battle, US and Japanese forces would be equals and the power would soon shift the other way.
Following Midway, US forces would be able to push Japanese forces back with invasions of Guadalcanal, the Phillippines, etc. In addition, if Japan had won the battle, they would have been allowed to push on to Australia. This would have resulted int the US losing important submarine bases and could have resulted in a recall of Australian troops from Africa.
As you can see, although this explanation is very brief, Midway was one of the most important battles of the war. Without it, the conflict could have lasted years longer and ultimately, the outcome could have been much different.