(A) ** Most American casualties in American history, at the time
(B) ** Grant put the Anaconda Plan into action
(C) Nothing
(D) ** Confederate won the first day, Union won the second.
EXPLANATIONS BELOW
Concept note-1: -Hardin County, TN | Apr 6-7, 1862. The Battle of Shiloh, also known as the Battle of Pittsburg Landing, allowed Union troops to penetrate the Confederate interior. The carnage was unprecedented, with the human toll being the greatest of any war on the American continent up to that date.
Concept note-2: -Confederate general Albert Sidney Johnston was wounded and bled to death, leaving P.G.T. Beauregard to disengage and retreat with a dispirited gray-clad army.
Concept note-3: -The Battle of Shiloh became a Union victory after the Confederate attack stalled on April 6, and fresh Yankee troops drove the Confederates from the field on April 7.