who converted to christianity after winning a decisive battle
Battle of the Milvian Bridge According to chroniclers such as Eusebius of Caesarea and Lactantius, the battle marked the beginning of Constantine's conversion to Christianity. Eusebius of Caesarea recounts that Constantine and his soldiers had a vision sent by the Christian God. This was interpreted as a promise of victory if the sign of the Chi-Rho, the first two letters of Christ's name in Greek, was painted on the soldiers' shields. The Arch of Constantine, erected in celebration of the victory, certainly attributes Constantine's success to divine intervention; however, the monument does not display any overtly Christian symbolism.
Third Crusade After the failure of the Second Crusade, the Zengid dynasty controlled a unified Syria and engaged in a conflict with the Fatimid rulers of Egypt. The Egyptian and Syrian forces were ultimately unified under Saladin, who employed them to reduce the Christian states and 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 in 1189, however, meant the English contingent came under the command of his successor, King Richard I of England (known as Richard the Lionheart, in French CÅ“ur de Lion). The elderly German Emperor Frederick Barbarossa also responded to the call to arms, leading a massive army across Anatolia, but he drowned in a river in Asia Minor 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.