Subject and Keywords:
Survival and guaranteeing ensuring development opportunities and increasing one's potential is one of the basic functions of the state. This function combining with providing the individual and the community with one of the most important human ontological needs, which is the sense of security, resulted in the issues of building the defense system of the state and organization of its armed force were in the sphere of interest of the most important political system bodies. The presented article focuses on the analysis of the role played by the Polish Sejm Walny in this respect, which gradually, from the end of the 15th century, became a body having a decisive influence on solving defense-related problems, initially the Crown of the Polish Kingdom and later the Polish-Lithuanian Commonwealth. Attention was paid to building the system of financing the defense system and the armed forces. Shaping the system of command and control of the armed forces taking into account the changes taking place in the structure of the armed forces and the process of transition from the formation of the militia to the national permanent army. Attention was paid to building a modern administration of military and defense affairs of the state, especially in the era of state reforms in the second half of the 18th century.