Series Militaria Ukrainica The book is devoted to the history of the Ukrainian army in the XIV-XVI centuries. Examples of military campaigns and battles analyze the traditions of Ukrainian armed groups, their tactics and fighting techniques in the confrontation with the nomadic hordes of the Steppe, the Moscow principality and the German Order. The role of Ukrainian regiments in the formation and development of the Grand Duchy of Lithuania is noted, the relationship between the organization of the army and the political system of the Gediminovych state, the continuity of the Ukrainian armed forces as part of European military development is shown. The publication is intended for a wide range of readers.