The Union feared Great Britain and France would recognise the Confederate States as a sovereign nation and intervene on their behalf. This meant these two countries would increase their aid to the South and raised the very real prospect of them sending troops to the battlefield. Had Lee and his army gained a victory on Union soil these fears would probably have come to pass. At best the battle was a draw.
The Union however claimed Antietam a victory and Abraham Lincoln issued the Emancipation Proclamation. The war took on a new complexion. Not only was it being fought to preserve the Union, but also to end slavery. Lincoln knew Great Britain and France would not fight against the abolition of slavery, thus the threat of foreign intervention disappeared.
...Britain granting recognition to the Confederacy and sending military aid.
The Battle of the Coral Sea. Although it was a tactical draw, the battle was a strategic win for the Allies because it stopped their drive toward Australia.
The battle that ended the British threats to the British US. northwest is The Battle of the Thames.
Because it ended the threat of war from the Native Americans
The U-Boats involved in the Battle for the Atlantic .
The Battle of Antietam was a major turning point in the Civil War because it detoured both the British and the French nations from recognizing the Confederacy. The battle took place in September of 1862.
...Britain granting recognition to the Confederacy and sending military aid.
The Battle of Antietam played a part in reducing the threat of European intervention on behalf of the Confederacy and gave Lincoln the victory he needed to proceed with the proclamations publication.
The battle that destroyed Hannibal as a threat to Rome was the Battle of Zama in 202 BC.
Many historians feel that the Battle of Saratoga was a turning point in the war because it showed the French that the Patriots actually had a shot to win the war. The relationship with France changed our fate in the war completely.
The battle of Zama, in Numidia, in 202 BC is where Scipio overcame Hannibal and his threat to Rome.
The Battle of Midway.
Battle of thames
The naval, Battle of Midway, is considered to be the turning point in the American war with Japan. The defeat and destruction of the Japanese naval force, meant that Japan could no longer pose a significant naval threat at sea.
The Battle of the Coral Sea. Although it was a tactical draw, the battle was a strategic win for the Allies because it stopped their drive toward Australia.
There wasnt a battle that ended japans threat, inface U.S.A was losing but the two nuclear bombs in Hiroshima and nagasaki ended the Japanese threat.
After the Battle of the Philippine Sea (Mariannas Turkey Shoot) the Japanese AIRCRAFT CARRIERS were no longer a threat. After the Battle of Leyte Gulf, the Japanese NAVY was no longer a threat. After the Battle of Okinawa the Japanese Military (except on Japan itself) was no longer a threat. After Okinawa, only Japan itself posed any threat. Two Atom Bombs were reserved for Japan proper.