Final answer:
President Lincoln called for volunteers during the Civil War to protect the North from the Confederacy, bring seceding states back into the Union, and free enslaved African Americans.
Explanation:
President Lincoln called for volunteers to join the US military in 1861 to:
- Protect the North from Confederate states: The need to defend the Union was crucial during the Civil War.
- Bring seceding states back into the Union: The recruitment of volunteers aimed to preserve the unity of the country.
- Free enslaved African Americans: Emancipation became a military strategy to weaken the South's ability to fight.
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