From the back of the book: Let there be war. Tome of Warfare is a supplement[...]providing additional options for players and Dungeon Masters alike, each centered around the concept of warfare. Within its pages you'll find: 23 new subclasses 2 new prestige classes 4 new classes A selection of new feats Expanded weapons and armor lists New magic items Additional combat options Additional siege weapons Expansive lists of fortifications and war strategies New spells NPC stat blocks