Over the next few months Saladin easily overran the entire kingdom. Only the port of Tyre remained in Frankish hands, defended by Conrad of Montferrat, who had coincidentally arrived just in time from Constantinople. The fall of Jerusalem essentially ended the first Kingdom of Jerusalem. Much of the population, swollen with refugees fleeing Saladin's conquest of the surrounding territory, was allowed to flee to Tyre, Tripoli, or Egypt (whence they were sent back to Europe), but those who could not pay for their freedom were sold into slavery, and those who could were often robbed by Christians and Muslims alike on their way into exile. The capture of the city led to the Third Crusade, launched in 1189 and led by Richard the Lionheart, Philip Augustus and Frederick Barbarossa, though the last drowned en route.