Overlooking the Machias River in Washington, Maine, the Fort O'Brien cannon, also known as "Napoleon', was created by the Ames Manufacturing Company of Chicopee, Massachusetts in 1862 and was placed in Fort O'Brien in 1863. During the Civil War, a five-gun battery was installed in Fort O'Brien, even though the fort saw no action. The cannon is made of bronze, weighs 1216 pounds and is capable of firing 12-pound cannonballs which in optimal conditions could reach 1600 yards. Today, this cannon is the only military object left on site.