On War (Vom Kriege) is a book on war and military strategy by Prussian general Carl von Clausewitz (1780–1831). It was written mostly after the Napoleonic wars (1816-1830).

The book is considered one of the most important works on strategy and political-military analysis ever written, and the book remains controversial and influential to this day.

Famous quotes from the book include:

“War is only a continuation of state policy by other means”

“State policy is the womb in which War is developed”

“War is the province of danger, and therefore courage above all things is the first quality of a warrior.”