On July 15, 1099, the City of Jerusalem was captured and plundered by Christian forces during the First Crusade. An excerpt from the article:
"The capture of Jerusalem from Muslim control was the primary goal of the First Crusade (1095-1102 CE), a combined military campaign organised by western rulers, the Pope, and the Byzantine Empire. After a brief siege, the city was captured on 15 July 1099 CE and the population massacred. A Muslim relief army was defeated three weeks later, and the First Crusade was hailed as a remarkable success in the west. The huge problems of logistics, famine, disease, a formidable enemy, and internal rivalries had all, somehow, been overcome, but the future defence of the Holy Land would require many more crusades over the next two centuries, and none would be as successful as the first."