(A) ** The Union
(B) The Confederacy
EXPLANATIONS BELOW
Concept note-1: -During the American Civil War, the Union, also known as the North, referred to the United States led by President Abraham Lincoln. It was opposed by the secessionist Confederate States of America (CSA), informally called “the Confederacy” or “the South".
Concept note-2: -The Union included the states of Maine, New York, New Hampshire, Vermont, Massachusetts, Connecticut, Rhode Island, Pennsylvania, New Jersey, Ohio, Indiana, Illinois, Kansas, Michigan, Wisconsin, Minnesota, Iowa, California, Nevada, and Oregon.
Concept note-3: -At 4:30 a.m. on April 12, 1861, Confederate troops fired on Fort Sumter in South Carolina’s Charleston Harbor.
Concept note-4: -The strategy for the United States was to surround the territory of the South in the Anaconda Plan, blockading the Atlantic Ocean and controlling the Mississippi, to keep goods from going into or out of the South and forcing them to surrender.