Why was the Union victory at the Battle of Vicksburg considered a significant battle of the Civil War? A. It was the first battle to use automatic weapons, and give the North the advantage in the war

B. It was the last battle in any Union state, and helped the South control the Mississippi River

C. It turned back the Confederate invasion of the North, and allowed the North control of the railways

D. The Union was now in charge of the Mississippi River, which would split the Confederacy in two.