How freed and enslaved African American men and women assisted the Union military effort during the Civil War.

1.) Explain how freed and enslaved African American men and women assisted the Union military effort during the Civil War.
2.) What did the Kansas-Nebraska Act and the Dred Scott Case mean to the abolitionist cause and to African Americans generally?
3.) Discuss the Emancipation Proclamation–its purpose, who it affected, who it did not affect, and the reactions to this document.