There is a lot of controversy as to why the U.S. Civil War started. Historians believe it was merely a difference in the two cultures. The U.S. Civil War was mainly started because of a difference in these two cultures. The South had an agricultural economy, and the North had a manufacturing economy. Because of such different ideals, both areas were fighting for different reasons. The North was fighting to abolish slavery, while the South was fighting to sustain slavery. The Battle of Gettysburg was a very important battle during the Civil War. The Confederate General, Robert E. Lee had proven to be invincible after his victories at Chancellorsville and Fredricksberg, and was