Looking at the current situation on the ground for the Ukrainian military, Henri Jomini and his work The Art of War provides not only a framework for analyzing the conflict at the campaign level, but also for providing a guide to the Ukrainian military in its effort to defeat the two separatist republics. Jomini’s core principles include offensive, rather than defensive, action, as well as massing forces at a decisive point of attack to gain local superiority. His magnum opus elaborates on these principles and their application, often applying geometric concepts and terms to battlefields and theaters of war for explanations.