He thought is was the only way to convince people that the government would honor its. obligations.
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The Freedmen' s Bureau was established to help protect the right of African Americans.
Answer:
Tubman decided to help the Union Army because she wanted freedom for all of the people who were forced into slavery, not just the few she could help on the Underground Railroad. And she convinced many other brave African Americans to join her as spies—even at the risk of being hanged if they were caught.
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