Publisher Blurb Of all the events that can affect a campaign, war is perhaps the most complex and deadly. It also proves a boon to DMs and players alike, who find new adventures, intrigues, and opportunities on the battlefield. When armies march, nations tremble and heroes come to the fore. The Essential d20 Guide to War Following the model of the popular event book Requiem for a God, 3rd Edition codesigner Skip Williams brings you Cry Havoc. This book examines all aspects of war in a d20 fantasy setting: From its political causes to grand strategy... From battlefield maneuvering to raising armies... From prolonged sieges to lightning commando raids. And of course, Cry Havoc includes a sampling of new spells, feats, and prestige classes as well. Last but certainly not least, this book offers the definitive d20 System rules for mass combat - straight from the pen of The Sage!