The Fourth Crusade

The Fourth Crusade (1202-1204) is notable for its deviation from its initial goal of invading Egypt to strengthen Christian forces against Muslim territories, ultimately leading to its focusing on internal conflicts within Christendom. Originally aimed at Egypt, the crusade instead became marked by major sieges of Constantinople and internal strife between Western and Eastern Christian groups. This shift led to the sack of Constantinople, highlighting a significant and controversial chapter in medieval history.