At fort Sumter, _____ troops opened fire on _____. the battle ended when ____.
1) The 54th mass. infantry / a confederate prison / the union solders inside were freed.
2) Confederate / a union raiding party / Gen, Lee surrendered at Appomattox courthouse
3) Union / a confederate outpost / confederate troops surrendered.
4) Confederate / a union outpost / Union troops surrendered.
