Third Crusade: Battle of Arsuf: Richard I of England defeats Saladin at Arsuf.

The Battle of Arsuf was a battle during the Third Crusade which took place on 7 September 1191. The battle was a Christian victory, with forces led by Richard I of England defeating a larger Ayyubid army led by Saladin.

The battle occurred just outside the city of Arsuf (Arsur in Latin), when Saladin met Richard's army as it was moving along the Mediterranean coast from Acre to Jaffa, following the capture of Acre. During their march from Acre, Saladin launched a series of harassing attacks on Richard's army, but the Christians successfully resisted these attempts to disrupt their cohesion. As the Crusaders crossed the plain to the north of Arsuf, Saladin committed the whole of his army to a pitched battle. Once again the Crusader army maintained a defensive formation as it marched, with Richard awaiting the ideal moment to mount a counterattack. However, after the Knights Hospitaller launched a charge at the Ayyubids, Richard was forced to commit his entire force to support the attack. After initial success, Richard was able to regroup his army and achieve victory.

The battle resulted in Christian control of the central Palestinian coast, including the port of Jaffa.

The Third Crusade (1189–1192) was an attempt by three European monarchs of Western Christianity (Philip II of France, Richard I of England and Frederick I, Holy Roman Emperor) to reconquer the Holy Land following the capture of Jerusalem by the Ayyubid sultan Saladin in 1187. For this reason, the Third Crusade is also known as the Kings' Crusade.It was partially successful, recapturing the important cities of Acre and Jaffa, and reversing most of Saladin's conquests, but it failed to recapture Jerusalem, which was the major aim of the Crusade and its religious focus.

After the failure of the Second Crusade of 1147–1149, the Zengid dynasty controlled a unified Syria and engaged in a conflict with the Fatimid rulers of Egypt. Saladin ultimately brought both the Egyptian and Syrian forces under his own control, and employed them to reduce the Crusader states and to recapture Jerusalem in 1187. Spurred by religious zeal, King Henry II of England and King Philip II of France (known as "Philip Augustus") ended their conflict with each other to lead a new crusade. The death of Henry (6 July 1189), however, meant the English contingent came under the command of his successor, King Richard I of England.

The elderly German Emperor Frederick Barbarossa also responded to the call to arms, leading a massive army across the Balkans and Anatolia. He achieved some victories against the Seljuk Sultanate of Rûm, but he drowned in a river on 10 June 1190 before reaching the Holy Land. His death caused tremendous grief among the German Crusaders, and most of his troops returned home.

After the Crusaders had driven the Muslims from Acre, Philip—in company with Frederick's successor in command of the German crusaders, Leopold V, Duke of Austria—left the Holy Land in August 1191. Following a major victory by the Crusaders at the Battle of Arsuf, most of the coastline of the Levant was returned to Christian control. On 2 September 1192 Richard and Saladin finalized the Treaty of Jaffa, which recognised Muslim control over Jerusalem but allowed unarmed Christian pilgrims and merchants to visit the city. Richard departed the Holy Land on 9 October 1192. The successes of the Third Crusade allowed Westerners to maintain considerable states in Cyprus and on the Syrian coast.

The failure to re-capture Jerusalem inspired the subsequent Fourth Crusade of 1202–1204, but Europeans would only regain the city—and only briefly—in the Sixth Crusade in 1229.