With regards to the second question, all the references I can find to soldiers in the 14th C describe them as either knights, men at arms ( which I believe are heavy cavalry similar to knights but without the knighthood?) or archers. Given the cost of outfitting heavy cavalry this seems to suggest that all the non wealthy soldiers fought as archers. Is this really the case, surely this would mean there were many archers in an army?
i've red some books about 14th century armies, although mostly about how they were gathered in the Iberian Christian Kingdoms, so not the areas you are trying to learn more. But the levy, and feudal system employed were pretty similiar. The call of arms as someone said in an earlier post was made by the King to a specific, raid or campaign and it was answered in different ways by different nobles, the problem was that sometimes the nobles weren't that much interested in participating in campaigns that didn't suited their interests or were far from their lands. While in the begginings of the reconquista the scene of border lands was always present and the nobles would rally to their Kings side more often, as the border grew further south, Kings had to implement a new system in which the nobles should have ready a number of "Lances" (Cavalry) and Peões (Infantry) , determined by their lands and wealth. This system grew more complex to include the equipment each soldier should have. There was also the Militias each major population center had, but they had a more defensive role.
In Portugal some of the militias were semi professional, especially the crossbowmen.
The level of soldier was still tied to it's wealth. In Portugal you had:
Cavalry
Nobles (Kings) and their mesnadas - With horses lances, armor and military training from birth.
Cavaleiros Vilões (men-at-arms) - Men that could afford a horse and better weapons and armour. (normally part of the Town Militias).
Infantry
mostly devided in two levels:
Besteiros do Condo (Crossbowmen of the county) - Men that didn't had a horse but had money to buy and mantain a crossbow and at least a piece of armor, later they where required to keep their training sharp.
Peões ("pawns") - well the poor bastards that hadn't any money to buy decent armor or weapons. their equipment mostly consisted of short spears and shields.
I can't stress how much important was having a horse in this times, although having a horse didn't necessarly mean that the soldier fought always or as cavalry, sometimes they used the horse to ride into a specific flank or place of the battle and then dismounted, also it's much easier to march to battles in a raid or campaign with full gear in a horse
