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Who joined the continental army after Saratoga?

General Horatio Gates, commander of the Northern Department of the Continental Army, is ready with 8,500 men

Explanation:

In the spring of 1777, the British ordered three of their armies to merge in Albany, New York. Only one army, however, commanded by General John Burgoyne, made the final push to its destination. Waiting for them was the heavily-fortified Northern Department of the Continental Army, commanded by General Horatio Gates

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