How did the emancipation proclamation the war effort in a practical way

Explanation:

The Proclamation broadened the goals of the Union war effort; it made the eradication of slavery into an explicit Union goal, in addition to the reuniting of the country. ... Because the Emancipation Proclamation made the abolition of slavery into a Union goal, it linked support for the Confederacy to support for slavery.

(b) britain had a much larger navy than the u.s.

(d) the u.s. had a small army compared to britain.

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