Today in WW II: 6 Dec 1944 Stalin meets Free French leader, Gen. Charles de Gaulle, in Moscow. More 
6 Dec 1944 Lt. General Lucian Truscott takes command of US 5th Army fighting in Italy, replacing Lt. Gen. Mark Clark.
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Chart of Military Vehicle Ammunition Trailers

2d Infantry Division M5 high-speed artillery tractor towing an M10 ammunition trailer, near Les Moulins, Omaha Beach West Exit D-3, Normandy, France, 7 June 1944
2d Infantry Division M5 high-speed artillery tractor towing an M10 ammunition trailer, near Les Moulins, Omaha Beach West Exit D-3, Normandy, France, 7 June 1944.

Military vehicle trailers for ammunition...

Vehicle Description Photo Link
M-10 M-10 Trailer, Ammunition, 2-wheel (G-660)  
M-21 M-21 Trailer, Ammunition, 4-ton, 2-wheel (G-213)  
M-23 M-23 Trailer, Ammunition, 8-Ton, 4-wheel (G-216)  
M-332 M-332 Trailer, 1 1/2 ton, Ammunition M-332 Trailer, 1 1/2 ton, Ammunition
M-989 M-989 Heavy Expanded Mobility Ammunition Trailer (HEMAT) 11-Ton