This paper examines the type of devotion of the early modern soldiers which was referred to as “the fearing of God”. The phenomenon started in the 1560s and continued for two centuries in the Polish and Lithuanian Duchy armies. It was based on the belief in the direct intervention of God during military action, which depended on the conduct of the soldiers. The commanders-in-chief promoted the vision of reality in which crimes were equated with sins and affected the outcome of (...) wars and battles, and even determined the safety of the soldiers themselves. The acts that were displeasing to God were to result in severe punishment during battles, while piety and good behavior guaranteed success. The analysis of this issue was conducted on the basis of normative acts issued by the commanders-in-chief, called military articles, which were supplemented by the analysis of military treaties. The paper emphasizes that this concept was promoted by all commanders regardless of denomination, including Polish Brethren, Lutherans, Reformed Evangelicals and Catholics. It was placed, as a rule, at the beginning of the military articles as an arenga, providing the basis for the validity of the criminal laws. The combination of the “fear of God” and the military law was shown to have rational justification: it guaranteed a higher discipline and morale, which could be reflected in the effectiveness of the warfare conducted. The application of this idea led to the breakdown of soldier solidarity and to the belief that the misconduct of individuals affected the fate of troops and entire armies. The most important creators of this concept include Florian Zebrzydowski, Jan Chodkiewicz and Stanisław Cikowski, and at the turn of the centuries it was developed by Jan Zamoyski and Krzysztof Radziwiłł, nicknamed Piorun. The most elaborate formula in the military articles was presented in the 17th century by Krzysztof Radziwiłł II, and a century later by Michał Kazimierz Radziwiłł. A hypothesis was also formulated that an old concept, which survived as one of the elements of Old Polish culture, was adopted to evaluate the Battle of Warsaw of 1920, which has been referred to as the Miracle on the Vistula, what was supposed to symbolize the causal role of God during the war. (shrink)