Barack Obama how did u not know
Answer:
I usually ask my teacher what specific things to study and although you already know what to study, they will usually tell you things that you can study that are prevalent on the test.
He found it necessary because Lincoln was only transferring food to the Northern army at the fort. However, once the ship came to the fort, it was believed (or assumed) by the south that inside the ship were supplies of weapons, soldiers, anything besides food. The South then opened fire, catching the North off guard and the first battle of the Civil war began.