4. Why did the Americans cross back over the bridge at Concord?

The Americans decided to cross the North Bridge back into Concord. They defeated the British troops at the North Bridge, giving the Americans renewed confidence. Soon the British commander, Colonel Francis Smith, realized that the American militia resistance was rapidly growing and it was time to retreat.

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answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;

abraham lincoln