Fort Sumter April 12th, 1861 - The Confederate army invaded while the north's resupplies while on their way to Fort Sumter. 27 northern states and 11 southern states went to war.
Battle of Antietam September 17-19, 1862- Robert E. Lee's armies of confederates marched into Aneitem Creek and started to fight. The union under Lincoln's power fought back and won.
No! You guys aren't getting past us.
Battle of Shilo, April 6-7th, 1862- Ulysses S. Grant tried to take the central Missippi ports for the union. Southern forces took over at the Shilo church, and the union lost.
Battle of Perryville October 8th, 1862- General Braxton Bragg confederate army attacked Union troops under General Don Carlos. 1/2 of the union participated in the battle.
Battle of the Stones River, December 31st - January 2nd, 1863- Confederates won this battle, but General William Rosecrans prevented confederates from getting control of the western territories.
Battle of Vicksburg, May 18th - July 4th, 1863- President Lincoln wanted to have control of the western territories for economic reasons. General Ulysses S. Grant bobared Vickberg and confederates lost.