Holy Wars describes three thousand years of war in the Holy Land with the unique approach of focusing on pivotal battles or campaigns, beginning with the Israelites' capture of Jericho and ending with Israel's last full-fledged assault against Lebanon. Its chapters stop along the way to examine key battles fought by the Philistines, Assyrians, Greeks, Romans, Arabs, Crusaders, and Mamluks—the latter clash, at Ayn Jalut, comprising the first time the Mongols suffered a decisive defeat.

The modern era saw the rise of the Ottomans and an incursion by Napoleon, who only found bloody stalemate outside the walls of Akko. The Holy Land became a battlefield again in World War I when the British fought the Turks. The nation of Israel was forged in conflict during its 1948 War of Independence, and subsequently found itself in desperate combat, often against great odds, in 1956 and 1967, and again in 1973, when it was surprised by a massive two-pronged assault.

By focusing on the climax of each conflict, while carefully setting each stage, Holy Wars examines an extraordinary breadth of military history—spanning in one volume the evolution of warfare over the centuries, as well as the enduring status of the Holy Land as a battleground.