"On War" by Carl von Clausewitz is a book on military strategy written between 1816 and 1830. This unfinished work, published posthumously in 1832, explores how war functions as a continuation of politics by other means. Drawing from experiences with Napoleon and the French Revolution, Clausewitz examines the unpredictable nature of warfare, the role of moral forces in battle, and why military strategy cannot follow strict universal principles. His controversial insights continue shaping military thinking today.