During the War of 1812 , his High Shoals ironworks produced cannonballs for use by the United States Army .
Fulenwider developed one of the earliest methods of making pig iron with the charcoal process .
During the War of 1812 , Fulenwider 's High Shoals ironworks produced cannonballs for use by the United States Army .
Fulenwider developed one of the earliest methods of making pig iron with the charcoal process .