Baldwin I of Jerusalem death, thought that "al-Bardawil" had started the First Crusade. Presenting a fictional correspondence between Baldwin and Roger I of Sicily, Al-Athir claimed that Baldwin had initially wanted to conquer Ifriqiya, but Roger, who wanted to secure the territory for himself, talked into him into attacking Jerusalem. Among modern historians, Thomas Asbridge states that Baldwin was one of the commanders of the First Crusade "whose skill, ambition and devotion drove the enterprise, and by turns threatened to rip it apart". Christopher Tyerman emphasises that Baldwin was a talented military commander and a clever politician, who "established a stable kingdom with defined
Baldwin I, Latin Emperor of this land. After Philip II of France took Baldwin's brother, Philippe of Namur, prisoner, Baldwin was forced to agree to a truce to ensure his safety. The Treaty of Péronne was signed in January 1200 on the condition that Baldwin receive the territories he had won during the war. Baldwin was made the vassal of Philip II, and the king returned portions of Artois to Baldwin. In this fight against the French king, Baldwin allied with others who had quarrels with Philip, including kings Richard I and John of England, and the German King Otto IV. A month after