Fort Sumter is significant because it is the place where the first battle of the American Civil War was fought the war was about guarding Charleston Harbor.
The Battle of Antietam helped end the Confederate Army of Northern Virginia's first capturing into the North and led Abraham Lincoln to issue the preliminary Emancipation Proclamation.
President Abraham Lincoln stated in the proclamation "that all persons held as slaves" within the rebellious states "are, and henceforward shall be free."
The siege resulted in the surrendering of the confederate forces at Vicksburg on the mississippi river. It was also one of the biggest Union victories of the American Civil War.
The battle of Gettysburg lead to the Union's victory that stopped Confederate General Robert E. Lee's second invasion of the North.
The main purpose of the Gettysburg address was to bring the country together, to show his perspective of the purpose of the United States and to provide a right path for the United States.
The Surrender at appomattox brought the four-year Civil War to an end.
Abraham Lincoln was assassinated by John Wilkes Booth at the Petersen House, Washington, D.C.