The battle of Glorieta pass took place on March 26th-28th, 1862. this battle was the most decisive battle in the civil war, the sides where able to turn back the Mexican territory, there was a total of 38 Union soldiers killed and 36 confederate. Both of the sides had claimed victory.
Battle of Antietam
The battle of Antietam took place on September 17th, 1862, this battle was the bloodiest battle in history with a result of 23,000 casualties. 23,000 men were killed in roughly 12 hours, this battle had ended the confederate invasion in Maryland and ended in a union victory. the battle was then named the bloodiest battle in history.
Siege of Vicksburg
Siege of Vicksburg took place on May 14th-July 4th, 1863, this battle was the last major military action in the civil war. The union had gotten full control over the Mississippi river and the union was able to shut down the confederates trade, transportation and military. The union had claimed the victory