Today in WW II: 15 Jan 1943 Pentagon building completed as US War Department headquarters after only 16 months of construction, costing approx $83 million.   

M55 Truck, Cargo, 5 Ton, 6x6, Extra Long Wheel Base (XLWB)

The M55 Truck, Cargo, Extra Long Wheel Base (XLWB), 5 ton, 6x6 is part of the G-744 (or M-39) series of 5 ton 6x6 trucks. More information about the history, model numbers, and configurations of the M39-series of trucks is on the linked page.

The M55 Truck, Cargo, 5 Ton, 6x6, Extra Long Wheel Base (XLWB) was produced with and without winch. The length was just under 386 inches (w/winch) with 242 inches from the center of the front axle to the center of the rearmost axle. There were -A1 and -A2 variants with different engines and slightly different dimensions.

M55 Truck, Cargo, 5 Ton, 6x6, Extra Long Wheel Base (XLWB) from TM 43-0001-31, June 1985, Page 4-165
M55 Truck, Cargo, 5 Ton, 6x6, Extra Long Wheel Base (XLWB) from TM 43-0001-31, June 1985, Page 4-165.