Templar
Gerard fell seriously ill, after which he took vows as a Templar. By June 1183 he held the rank of seneschal of the Order. He was elected Grand Master in late 1184 or early 1185, after the death of Arnold of Torroja in Verona.
Gerard continued to hold a grudge against Raymond of Tripoli, which influenced some of his political manœuvrings. In 1186, when Baldwin V of Jerusalem died, Gerard took the side of Queen Sibylla and her husband Guy of Lusignan in the ensuing succession struggle. Raymond and his allies the Ibelin family were the leaders of the opposing faction, who supported the claim of Sibylla's younger half-sister Isabella.
In the crisis of 1187, Gerard used the money sent by Henry II of England and deposited with the Templars in Jerusalem to hire additional troops for the arrière ban to defend the Kingdom of Jerusalem from Saladin. (Henry had sent the funds for his own future crusading plans, in penance for the murder of Thomas Becket: some of it was deposited with the Templars, some with the Hospitallers, in Jerusalem and Tyre). Gerard and fewer than 100 Templars, together with some Hospitallers, attacked Saladin's son al-Afdal at the Battle of Cresson; al-Afdal, however, had over 5,000 men. The Hospitaller Grand Master Roger de Moulins was killed; Gerard, though wounded, was one of the few survivors. Gerard's report of the battle was the source for a short narrative written by Pope Urban III to Baldwin of Exeter, archbishop of Canterbury.
In July of the same year Gerard led the Templars at the Battle of Hattin. Saladin had captured Tiberias and Guy was contemplating a march on the city to retake it. Raymond advised him to wait for Saladin to come to them, since they were in a well-defended, well-watered position, and would have to cross a dry open plain to reach Tiberias. Gerard opposed this, and convinced Guy to continue the march. He was supported by Raynald of Châtillon, a fellow enemy of Raymond.
The armies of Outremer ended up trapped on the dry plain and were defeated on July 4. Raymond and several other nobles escaped, but Gerard, Guy, and Raynald were captured by Saladin. The rest of the Templar prisoners were executed. Gerard remained a prisoner until 1188, during which time his Order was commanded by Brother Thierry (Terricus) from Tyre.
Gerard was given the condition by Saladin that, if he could convince a Templar fortress to surrender peacefully, he would be set free. He succeeded and on his release went to Tortosa, where he ably led the Templars' defence of their castle, which held out after the fall of the town to Saladin's siege forces. Having taken back control of his order from Thierry, he seems to have seized the remainder of Henry II's money which had been left with the Templars in Tyre. This provoked a complaint from the city's defender, Conrad of Montferrat, in letters of 20 September 1188 to Baldwin of Exeter and Frederick Barbarossa: "...graver still, the Master of the Temple has made off with the King of England's alms".
In 1189, he again joined forces with Guy, taking the Templars to the Siege of Acre. He was beheaded after being taken prisoner by Saladin again on October 1, 1189.
Read more about this topic: Gerard De Ridefort