Question: Before 21 Lithuanian dukes signed a peace treaty with Galicia–Volhynia, what is an example of the war-related functions the group who made up the majority of the military-economic staff of the state performed?
Sentence (from "History of Lithuania (1219–95)"): In 1219, 21 Lithuanian dukes signed a peace treaty with Galicia–Volhynia.
Relevant evidence: Yes