What was the north’s main goal during the first portion of the civil war

The main goal of the North at the outset was to bring the Southern states back into the Union.

Explanation:

Ending slavery was not a major Northern goal at first, but this changed as the war continued.

But the purpose of the Civil War had now changed. The North was not only fighting to preserve the Union, it was fighting to end slavery. Throughout this time, northern black men had continued to pressure the army to enlist them.

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