Confederate General PGT Beauregard bombarded Fort Sumter on 12 April 1861, when President Abraham Lincoln announced plans to replenish the fort. Anderson and 86 troops surrendered on 13 April after a 34-hour cannon firefight. This was an important battle because it started the civil war.
It was a strategy of the north to block the South from trading. Union forces established a blockade of Confederate ports designed to prevent the export of cotton and the smuggling of war materiel. Union thought this would make the Confederate economy collapse.
The Battle of Gettysburg in July 1863 was a victory for the Union which stopped the second invasion of Confederate General Robert E. Lee of the North. During 3-day battle more than 50,000 men were killed and the battle became bloodiest battle of the American Civil War. It was a turning point of the war. Now union were wining.