What was a battlefield tactic that the Continental Army utilized throughout the American Revolution?

What happened as a result of the colonial victory at saratoga

The impeachment of president clinton by the u.s. house of representatives occurred with a. virtually all republicans supporting it, while virtually all democrats opposed it b. about two-thirds of republicans supporting it and about two-thirds of democrats opposing it c. half of all democrats and half of all republicans supporting it, while half of all democrats and half of all republicans opposed it d. virtually all democrats supporting it, while virtually all republicans opposed it

Which of these is an edge city? boston, ma chicago, il irvine, ca detroit, mi