What was the most important battle of the American Civil War? Self explanitory. The options are a numbers of major battles that I can think of, other is there incase you can think of a better choice. Choices are:
Fort Sumter - http://en.wikipedia.org/wiki/Battle_of_Fort_Sumter
1st Manassas - http://en.wikipedia.org/wiki/First_Battle_of_Bull_Run
Shiloh - http://en.wikipedia.org/wiki/Battle_Of_Shiloh
2nd Manassas - http://en.wikipedia.org/wiki/Battle_of_2nd_Bull_Run
Antietam - http://en.wikipedia.org/wiki/Battle_of_Antietam
Perryville - http://en.wikipedia.org/wiki/Battle_of_Perryville
Fredericksburg - http://en.wikipedia.org/wiki/Battle_of_Fredericksburg
Murfressboro - http://en.wikipedia.org/wiki/Battle_of_Murfreesboro
Chancellorsville - http://en.wikipedia.org/wiki/Battle_of_Chancellorsville
Gettysburg - http://en.wikipedia.org/wiki/Battle_of_Gettysburg
Vicksburg - http://en.wikipedia.org/wiki/Battle_of_Vicksburg
Chickamauga - http://en.wikipedia.org/wiki/Battle_of_Chickamauga
Chattanooga - http://en.wikipedia.org/wiki/Third_Battle_of_Chattanooga
Fort Sumter - http://en.wikipedia.org/wiki/Battle_of_Fort_Sumter
1st Manassas - http://en.wikipedia.org/wiki/First_Battle_of_Bull_Run
Shiloh - http://en.wikipedia.org/wiki/Battle_Of_Shiloh
2nd Manassas - http://en.wikipedia.org/wiki/Battle_of_2nd_Bull_Run
Antietam - http://en.wikipedia.org/wiki/Battle_of_Antietam
Perryville - http://en.wikipedia.org/wiki/Battle_of_Perryville
Fredericksburg - http://en.wikipedia.org/wiki/Battle_of_Fredericksburg
Murfressboro - http://en.wikipedia.org/wiki/Battle_of_Murfreesboro
Chancellorsville - http://en.wikipedia.org/wiki/Battle_of_Chancellorsville
Gettysburg - http://en.wikipedia.org/wiki/Battle_of_Gettysburg
Vicksburg - http://en.wikipedia.org/wiki/Battle_of_Vicksburg
Chickamauga - http://en.wikipedia.org/wiki/Battle_of_Chickamauga
Chattanooga - http://en.wikipedia.org/wiki/Third_Battle_of_Chattanooga