The American Civil War in 11 Pictures - 5/11
The 'real' war started when Fort Sumter was attacked by Confederates claiming the fort belonged to them. Initially the North states just wanted to restore the Union, but then wanted to destroy the Confederate States and the institution of slavery with them. The Conferderate army was heavily outnumbered (21 million people were living in the North in contrast to 9 million in the South), but that didn't scare them off initially. It wasn't so long ago since the outnumbered Americans had won a war against the way more mighty Britain.