I bet Gettysburg will be a safe place to get supplies...
Day 1 of fighting
Union: They obviously didn't know we would be here! Lets fight.
Confederates: I didn't know the Union would be here!
Day 2 of fighting
Union: This is a vicious fight, but we can defend Little Round Top.
Confederates: If we can capture Little Round Top, we've got them beat.
Day 3 of fighting
Union: The cannon fire is pointless and they've caused no damage to us, so let's stop.
Confederates: Their defensive line wasn't that great, we must have destroyed them!
Lee hoped that the Union's would give a final attack, so when they didn''t his hopes of invasion left. The Union came out with an important victory, and turned the tide of the war against the Confederates.
Lincoln's speech addressed and honored the sacrifice that the soldiers made in the Battle of Gettysburg, and he talked about the obvious hope and knowledge that the Union could, and would win the war.