For those of you following the snippets of I Know George Washington: a video about the Brown Bess, the musket used by both sides during the American Revolutionary War.
This weapon, like other smoothbore muskets, did not have a rifled barrel. The lack of rifling made the Brown Bess considerably less accurate than modern (mid-1800s onward) weapons.
The limited accuracy of the smoothbore partly accounts for the 18th century’s formation-based style of warfare.
Soldiers in formations typically lined up in open fields, and fired in rows at their opponents.