1900 - 1930's era Pre WW1 and up to the beginning of WW2
A - Z Units
Aero
Armies
Corps
Divisions
Enlisted
Regiments
Cavalry
Advanced Service of Supply
1st American Field Service
Army Expeditionary Forces North Africa
Artillery Repair Service
Army Convoy Personnel assigned to ships
Army Expeditionary Forces - Siberia
Army Expeditionary Forces - Siberia PK
Army Expeditionary Forces - Siberia ?
Ambulance Services
Ambulance Services Made for Reunion-not WW1
Armored Tank Corps
Studley Mfgr. - Armored Units
Headquarters Armored Units
Bloody Hand Award
Camouflage Units
Chemical Warfare units PK
Corps of Engineers
Corps of Engineers HQ
District of Paris
General Headquarters - AEF
Hospital attached to 1st Army
34th Base Hospital
Liaison Services PK
Minnesota National Guard-Post WW1
North Russian Expedition
Post Office Services PK
Railheads Regulating Stations PK
Railheads Regulating Stations
Railheads Regulating Stations Is Sur Tille Station
Railheads Regulating Stations Cobenz Station
Railheads Regulating Stations Lif Fel Le Grande Station
Railheads Regulating Stations Teves Station
Ordnance Repair Shops
Railway Artillery Reserve PK
Railway Artillery Reserve
A red rectangle removed from a WW1 tunic. ??
Reserve Mallet
Reserve Training Center
Separate Artillery Bde
Service of Supply PK
State Guard-Maine?
State Guard-?
Transportation Services
Unattached Anti-Aircraft Units