It's a lot for a preindustrial society that has a very low surplus economic output that can be collected and diverted into a military by taxes. Also, the logis

It's a lot for a preindustrial society that has a very low surplus economic output that can be collected and diverted into a military by taxes. Also, the logistics of keeping the legion fed and quartered when it is resting, or campaigning look a lot like 'it eats the countryside bare, and the peasants unlucky enough to be in its path starve'. Even in an industrialized society, how many families do you know that would be able to quarter and feed, say, three to six soldiers for the four months break that they take from winter campaigning?