Often named the single greatest northern military leader in the civil war, this west point graduate was known for his victory at vicksburg in 1863 and his leadership over the union army during the latter half of the war.

which famous civil war figure is described above?

Ulysses S. Grant.

Explanation:

Ulysses S. Grant started his military career in the Military Academy at West Point in 1839. After victories such as the one at Vicksburg in 1863,  Grant was promoted by President Lincoln to Major General and later to Lieutenant General in charge of the entire Union Armies. His reputation qualified him to be elected twice as the President of the United States.

i think the answer is a and i hope this ; ))

c. troops marched forward in close formation against newer, more accurate weapons