[Isaac] Trimble was one of the oldest combat officers of the Civil War. Despite his age, he had a distinguished record, noted for personal bravery, combativeness, and skill. A southerner by birth, he never questioned the rightness of the Confederate cause and devoted himself to it. He was perhaps Maryland's finest soldier in the conflict.
Jeffry D. Wert, "Trimble, Isaac Ridgeway," American National Biography Online, February 2000, http://www.anb.org/articles/05/05-00792.html.