From the back of the book:
Reinforcements Have Arrived!
Individual heroes skirmish and mighty armies clash in this core sourcebook for Dungeons & Dragons® Warcraft® the Roleplaying Game, which translates the hugely successful Warcraft® computer game series into an exciting pen-and-paper roleplaying game world based on the popular d20 System rules!
Requires the use of the Dungeons & Dragons Player's Handbook, version 3.5, published by Wizards of the Coast®.
Designed with extensive input from the creative minds behind the Warcraft computer games, the Alliance & Horde Compendium includes:
7 new player character races, 8 new prestige classes, and a horde of new feats unique to Warcraft but compatible with any revised 3rd Edition campaign.
Mass combat rules for the Warcraft RPG setting, based on Skip Williams's Cry Havoc(TM) from Malhavoc Press.
Siege weapon listings and descriptions for mass combats.
Revealing source material from the Warcraft III: The Frozen Throne(TM) RTS expansion.