 In addition to all these moneys expended upon the sick and upon other poor people, this same house also maintains in its various castles many persons trained to all kinds of military exercises for the defence of the land of the Christians against the invasion of the Saracens.After the Siege of Jerusalem in October 1187, all Christians were driven out of Jerusalem by Sultan Saladin.The Hospitallers were permitted to leave ten of their number in the city to care for the wounded until they were able to travel.