Today in WW II: 25 May 1940 Boulogne, France is captured by the Germans.  More 
25 May 1941 King George of Greece abandons Crete, relocating to Cairo in a narrow escape from German forces.
25 May 1942 Japanese attack force leaves Hokkaido for invasion of the Aleutians Islands, Alaska.
25 May 1945 Chiefs of Staff of US military set 1 November 1945 as start date for invasion of Japan [Operation Downfall]. The huge casualties of Downfall avoided by use of Atomic Bombs in Aug 1945.
Visit the Olive-Drab.com World War II Timeline for day-by-day events 1939-1945! See also WW2 Books.

Chart of Military Vehicle Cargo Trailers

US Airmen with the 374th Airlift Wing prepare to load an M1101 Light Tactical Trailer onto a C-130 Hercules aircraft during the engine running on/offload (ERO) competition of the Air Mobility Rodeo 2011, Joint Base Lewis-McChord, WA, 25 July 2011
US Airmen with the 374th Airlift Wing prepare to load an M1101 Light Tactical Trailer onto a C-130 Hercules aircraft during the engine running on/offload (ERO) competition of the Air Mobility Rodeo 2011, Joint Base Lewis-McChord, WA, 25 July 2011.

Military vehicle trailers for general cargo are designed to be used with a specific truck or range of trucks so that the towed weight matches the capacity of the prime mover. Wheels and tires are often the same on the truck and the trailer, providing more capability to recover from a flat tire or damaged wheel. Trailers with a lunette match the height of the truck's pintle within a reasonable range. The intervehicular cable from the trailer matches the socket on the truck.

Vehicle Description Photo Link
G-518 Trailer, Cargo, 2 Wheel, 1 ton, World War II (G-518) Trailer, Cargo, 2 Wheel, 1 ton, World War II (G518)
M-101 Trailer, 3/4 ton (G748). Commonly used with M-37 and larger trucks including HMMWV. Variants A1 and A2. M-101 Trailer, 3/4 ton. Commonly used with M-37 and larger trucks including HMMWV. Variants A1 and A2.
M-104 M-104 1 1/2 ton 2-Wheel Cargo Trailer (G-754) M-104 Trailer, 1 1/2 ton
M-105 M-105 1 1/2 ton 2-Wheel Cargo Trailer (G-754) M-105 Trailer, 1 1/2 ton
LTT/HMT
M1101 & M1102
Light Tactical Trailer / High Mobility Trailer
Models M1101, M1102 and Chassis
M-1102 Trailer, 5/4 ton. Used with HMMWV
FMTV Family of Medium Tactical Vehicles (FMTV)
Two trailers (2.5 ton and 5 ton) described on the linked page and subpages.
Trailer Family of Medium Tactical Vehicles (FMTV)
MTVR Cargo USMC Medium Tactical Vehicle Replacement (MTVR) Cargo Trailer (MK105) USMC Medium Tactical Vehicle Replacement (MTVR) Cargo Trailer (MK105)