Second Crusade. The Second Crusade (1147–1150). After the disastrous siege of Edessa in 1144, the Western powers launched the Second Crusade, which accomplished little. Principal chroniclers of the event were Odo of Deuil, chaplin to Louis VII of France, who wrote his account "De profectione Ludovici VII in Orientem" and Otto of Freising who wrote "Gesta Friderici imperatoris" concerning the emperor Frederick Barbarosso. Referred to as the Second Crusade in Maimbourg's "Histoire des Croisades.".. as well as Georg Müller's "De Expedition Cruciatis Vulgo Von Kreutz Fahrten" (1709). Thomas Fuller referred to it as Voyage 3 of the Holy Warre. The Wendish Crusade of 1147 (one of the Northern Crusades) is usually associated with the Second Crusade.