Status Updates From The Hundred Years War: Engl...

"In the structuring characteristic of medieval society, it was possible for men to move from one grade to another, to move up and, sometimes, down. They could improve their social and material standing in society through, for instance, education, connection and service. War was also an important way of achieving social distinction and advancement."

John Bromyard, a Dominican, wrote in 1360 that war must only be waged if the ruler can pay for it.

It took thirty years, from 1325 onward, for the principle that taxes are emergency measures and must be refunded if they are no longer necessary to be supplanted by the principle that taxes are general and permanent.

"In France the thirteenth century had witnessed a gradual advance in what was regarded as a vassal’s obligation, from defence of his lord (the king) to defence of the crown (the corona) and, by the end of the century, defence of the kingdom (the regnum)."

The "arriere-ban" existed only since the beginning of the 13th century, and did not have to mean military service, but could mean payment or providing tools. It also exclusively served defensive needs.