Greenwich men served in twenty-six Connecticut regiments. A few Greenwich men also enlisted in New York regiments. These soldiers fought in almost every major civil war campaign, including the battles of First Bull Run, Antietam, Second Bull Run, Cold Harbor, Gettysburg as well as the siege of Charleston and the trench battles of Petersburg. Approximately half of Greenwich soldiers fought in two infantry regiments, the 10th Connecticut Volunteers and the 17th Connecticut Volunteers.