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Answers:
#2: "All the misery and degradation suffered in our regiment by its members' families is not atoned for by the passage of the bill for equal pay." Basically meaning that he believed his soilders had gone through enough to earn the equal pay that the white soilders were being payed.
#3: They were the mascot of all African American soilders, being the first all black regiment. If they had wimped out and gone home, it would have set the president that African Americans were weak and not built for war, and they knew this.
