Lincoln wanted all the Confederate States to join back the union and he did that by issuing the Emancipation Proclamation which basically stated that if the Confederate states did not join the Union by January 1, 1863 then all slaves would be freed.
The part of the ocean or sea that cuts far into the adjacent land mass is often referred to as a "shelf" or "plateau", since it is simply an extension of the land mass that makes up the area above the water.
Because it had cannons and ammo
