Archangel by Polish illustrator Mariusz Kozik (Lacedemon) of Lublin City
"Polish knights, like their German and other neighbours, were expected to arm themselves and their retainers, the numbers of the latter depending upon a knight’s wealth and the value of his territorial fief. The most numerous military followings were those of the so-called barones or barons, while the nobiles or middle-ranking knights led smaller forces; the retinues themselves were made up of warriors who did not usually own land. Alongside these landless fighting men were the ‘created knights’, maintained or organized by the advocati or mayors of Poland’s increasing number of towns, and the sculteti, who were effectively village administrators or headmen.
The ruler had the right to call upon these knights at any time he considered it necessary, and would employ two distinct forms of mobilization. The first system of service was known as infra terram, which meant a summons in defence of the realm. The second was called extra terram, which, as its name indicates, meant campaigning outside the country.”
Excerpt from “Medieval Polish Armies 966-1500” (Osprey Publishing) by W. Sarnecki and D. Nicolle