Slaves participated in the war effort as sailors or soldiers, helping to abolish slavery. Former slaves worked as cleaners, cooks, and finally warriors in the conflict. Blacks were treated equally in the navy and aided in the maritime conflict.
Attacking the south's economy was part of the north's military strategy. Slavery made up the majority of the southern economy. The Emancipation Proclamation was issued by President Lincoln in an effort to undermine the southern economy.
Slaves who were under the control of the Confederate States were set free by the Emancipation Proclamation. Thus, the emancipation proclamation, northern military strategy, and slaves' own actions all worked together to put an end to slavery.
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