(A) ** Secede
(B) Ironclad
(C) Border State
(D) Casualty
EXPLANATIONS BELOW
Concept note-1: -Which word means to leave or become unassociated with? Secede. The name that was given to the north was? Union .
Concept note-2: -an act of seceding; formal withdrawal or separation. 2. [ often S-] the withdrawal of the Southern states from the federal Union at the start of the Civil War.
Concept note-3: -secession, in U.S. history, the withdrawal of 11 slave states (states in which slaveholding was legal) from the Union during 1860–61 following the election of Abraham Lincoln as president. Secession precipitated the American Civil War. Confederate States of America.
Concept note-4: -The U.S borders were split between the United States of America, Confederate States of America, Border States, and Territories. On February 4, 1861, the seven states that had seceded by this point convened and created the Confederate States of America under the leadership of Jefferson Davis.
Concept note-5: -The first land battle of the Civil War was fought on July 21, 1861, just 30 miles from Washington-close enough for U.S. senators to witness the battle in person. Southerners called it the Battle of Manassas, after the closest town. Northerners called it Bull Run, after a stream running through the battlefield.