Description

Adamson Tannehill was an American military officer, politician, civic leader, and active participant in the early development of Pittsburgh and western Pennsylvania. Born in Frederick County, Maryland, Tannehill was among the first volunteers to join the newly established Continental Army during the American Revolutionary War, serving from June 1775 until 1781. He reached the rank of captain and was commander of the Maryland and Virginia Rifle Regiment, the longest-serving Continental rifle unit of the war. He participated in several major engagements, including the battles of Trenton, Princeton, and Saratoga. After the conflict, Tannehill settled in Pittsburgh, Pennsylvania, his last military posting of the war. He was active in the Pennsylvania state militia, advancing to major general in 1811. Tannehill also served as a brigadier general of United States Volunteers in the War of 1812.