| 7Dec42-12Mar44 | 401st Provisional Station Gas Defense Detachment |
| 15May43-11Feb44 | 401st Signal Company, Aviation (less Radio Intelligence Platoon) |
| 1Mar44-25May44 | Headquarters, XV Corps |
GI Trail NI - discover the path the GI's took in Northern Ireland.
Follow the GI Trail and learn about the American GIs in Northern Ireland during World War 2. Re-trace their footsteps and relive the exciting past of the American GI's.