Answer:
They used death marches in order to hide the proof that the Holocaust happened or at least that it wasn't as bad as it was. In 1945 the Germans were decisively losing the war so the SS organized the so-called death marches. They were most likely called death marches by the prisoners and not the SS. They evacuated the camps to keep prisoners from getting liberated.
Answer: It showed that progress was being made in defeating the South, and it helped persuade Union voters to re-elect Lincoln as President.
Explanation:
Check the picture i sent you i hope it'll help
Dwight eisenhower is the answer