Why are primary sources valuable to historians? They provide a thorough analysis of an event’s impact on history.
They provide insight into the thoughts and feelings of a participant in history.
They compare and contrast different perspectives on an event or time period.
They evaluate how an event is viewed after a long period of time.

first second and third

explanation:

bloodiest single day of war   |   gettysburg

where the civil war ends for good   | appomattox court house

the first major land battle; south wins | bull run/manassas (va)

gives union control of the mississippi river |   vicksburg

lee’s first tactical defeat; big win for union |   fort sumter1

with lincoln's re-election |   atlanta

south wins

splits confederacy in two for the duration of the war,

antietam

c or d. good luck !