A Union ship found a British ship with several Confederates in to and everyone was mad.
They allowed any citizen who was pro-Union to revive 160 acres of free land, they did this to rally support for the Union.
McClellan wanted to take on the south from the sea, he was overly cautious and he failed.
The battle between the Merrimack and the Monitor, two primitive battleships. Both of the ships were clad in impenetrable iron armor.
This freed all slaves(not in border states) and made the war moral so as to prevent European intervention.
This battle cut off the confederate access point to the Mississippi River, limiting the import of any goods that would supply the Confederacy
The last offensive battle for General Lee and this ended his campaign for peace. This was also the bloodiest battle of the war.
This was the address that Lincoln gave after Gettysburg. Not many people were paying attention or even listening to what he said at the time but now it is very celebrated.
This made the pain of war apply to the civilian, or at least the Confederate civilian and led to many disheartening reports of pillaging(disheartening to the Confederates).
This outlawed slavery, as the Empancipation Proclamation had only freed slaves in the rebel states and it wasn't even recognized by them at the time.