What have the Romans done for us?

Someone, and I wish I recall who or even where, once sold me on the notion that Roman expansion was empowered by the same kind of 'replaceable parts' strategy that powered the ascention of the United States.

According to this person, everywhere the Romans went they left cookie cutter solutions to problems that made their military more fungible. If I move these guys from southern France, to northern Greece, everything is set up the same way and they can hit the ground running.

Where we have standardized manufactured equipment, they had standardized infrastructure.