Edward I of England returns from the Ninth Crusade and is crowned King seventeen days later.

The Ninth Crusade (1271–1272) is generally regarded as the last major crusade to the Holy Land. It was led by Prince Edward of England, the future King Edward I, who joined the campaign after the failure of the Eighth Crusade. When King Louis IX of France died during the siege of Tunis in 1270, many crusaders returned home, but Edward continued east to the Crusader stronghold of Acre. By this time, the Crusader states had been reduced to a narrow strip of territory along the Mediterranean coast and faced constant pressure from the expanding Mamluk Sultanate under Sultan Baibars. Edward hoped to strengthen the remaining Christian positions and encourage a broader European effort to reclaim the Holy Land.

Arriving in Acre in May 1271 with only a relatively small force, Edward lacked the troops needed for a large-scale offensive. Instead, he conducted a series of raids against Mamluk-held territory and sought alliances with regional powers. One of his most significant diplomatic efforts was securing the cooperation of the Mongol Ilkhan Abaqa, whose forces launched raids into Syria to distract the Mamluks. However, the Mongol attacks were too limited and poorly coordinated to have a lasting impact. Edward also negotiated a temporary truce with Sultan Baibars after realizing that neither side could gain a decisive advantage. During his stay in Acre, Edward survived an assassination attempt by a man believed to have been associated with the Nizari Isma’ilis, suffering a wound that he eventually recovered from.

The Ninth Crusade achieved few lasting military successes, but it marked the end of the era of large-scale crusading expeditions to the Holy Land. Edward departed for England in 1272 after learning of the death of his father, King Henry III, and soon became King Edward I. Although the truce briefly delayed further conflict, the Crusader states continued to weaken. In 1291, the Mamluks captured Acre, bringing an end to the Kingdom of Jerusalem and the Christian presence in the Holy Land as a territorial power. The Ninth Crusade is therefore remembered less for its battlefield achievements than as the final chapter in the centuries-long Crusades to the eastern Mediterranean.