Why are cargo pants called that?
The so-called "paratrooper pants" were built around a simple equation: More pocket-space meant more stuff could be carried. Hence, the “cargo” pant nickname. After World War II, the paratroopers' dual pocket cargo pant became standard issue for almost all branches of the U.S. military.
Are cargo pants khakis?
The traditional cargo pant is a utilitarian pair of khaki pants, differentiated from regular pants by its cargo pockets. Cargo pockets are large square-shaped patch pockets located on the side of each pant leg, usually at the lower thigh. These are in addition to the standard front pockets.