Today in WW II: 14 Jan 1943 Churchill and Roosevelt begin the Casablanca conference.   

Chart of Military Semitrailers, Low Bed

Soldiers from the Forward Support Company, 54th Engineer Battalion, load equipment and supplies onto an M870 40-ton semitrailer for a logistics convoy while deployed to Iraq, June 2009
Soldiers from the Forward Support Company, 54th Engineer Battalion, load equipment and supplies onto an M870 40-ton semitrailer for a logistics convoy while deployed to Iraq, June 2009.

Vehicle Description Photo Link
M-9 Trailer, Tank, 45 Ton, M9 (G159) with integrated dolly Trailer, Tank, 45 Ton, M9 (G159)
M-15 Semi-Trailer, Transporter, 40 Ton, 8-wheel, M15 and variants (G160) Semi-Trailer, Transporter, 40 Ton, 8-wheel, M15 and variants (G160)
M-172 Semitrailer, Low-Bed, 4 Wheel M172 (15 Ton) & M172A1 (25 Ton) (G797) Semitrailer, Low-Bed, 4 Wheel M172 (15 Ton) & M172A1 (25 Ton)
M-269 M-269 Semitrailer, Low Bed. 12-ton, Wrecker, 4-wheel
Manual TM 9-8240		 M-269 Semitrailer, Low Bed. 12-ton, Wrecker, 4-wheel
M-270 M-270 Semitrailer, Low Bed. 12-ton, Wrecker, 4-wheel
Manual TM 9-8240		 M-270 Semitrailer, Low Bed. 12-ton, Wrecker, 4-wheel
M-747 M747 Semi-Trailer, Low Bed, Heavy Equipment Transporter, 60 ton M747 Semi-Trailer, Low Bed, Heavy Equipment Transporter, 60 ton
M-870 M870 Semitrailer Low Bed 40 ton and variants M-870 Semitrailer Low Bed 40 ton and variants
M-1000 M-1000 Semitrailer Low Bed 70 ton Rear Loading M-1000 Semitrailer Low Bed 70 ton Rear Loading