Aspyr will publish the 'Warlords' expansion pack for Sid Meier's Civilization IV November 2006.

It's the first expansion pack for Civilization IV. It offers homage to some of history's greatest military leaders, through the form of eight unique scenarios, based on leaders including Alexander the Great and Genghis Khan.

The expansion pack includes new civilizations, leaders, units, and wonders. It also offers vassal states - players can dominate countries around them with no need to obliterate the states.

New civilizations, leaders, leader traits, wonders and building also debut in the soon-to-ship expansion pack.