The decentralization of the colony was almost incredible. The core of the kingdom was the barony of Jerusalem, which extended only from the Egyptian desert to a stream just north of Beyrout, and inland to the Jordan and the spurs of the hills beyond the Dead Sea, and yet it was divided into more than eighteen independent fiefs, whose lords had all the rights of sovereignty, made war, administered justice, and coined money.[102] Beside these petty states, the ports were ceded to the Italian cities whose fleets helped in the conquest. Venice, Genoa, and Pisa held quarters in Ascalon, Joppa, Tyre, Acre, and Beyrout, which were governed by consuls or viscounts, who wrangled with each other and with the central government. Such was the kingdom over which Godfrey reigned, but there were three others like it which together made up the Frankish monarchy. To the north of the barony of Jerusalem lay the county of Tripoli, and beyond Tripoli, extending to Armenia, the principality of Antioch. To the east of Antioch the county of Edessa stretched along the base of the Taurus Mountains and spread out somewhat indefinitely beyond the Euphrates. Thus on the north Edessa was the outwork of Christendom, while to the south the castle of Karak, which commanded the caravan road between Suez and Damascus, held a corresponding position among the hills to the east of the Dead Sea. Beyond the mountains the great plain sweeps away into Central Asia, and in this plain the Franks never could maintain their footing. Their failure to do so proved their ruin, for their position lay exposed to attack from Damascus; and it was by operating from Damascus as a base that Saladin succeeded in forcing the pass of Banias, and in cutting the Latin possessions in two at the battle of Tiberias. A considerable body of Europeans were thus driven in like a wedge between Egypt and the Greek Empire, the two highest civilizations of the Middle Ages, while in front lay the Syrian cities of the plain, with whom the Christians were at permanent war. The contact was the closest, the struggle for existence the sharpest, and the barbaric mind received a stimulus not unlike the impulse Gaul received from Rome; for the interval which separated the East from the West, at the beginning of the twelfth century, was probably not less than that which divided Italy from Gaul at the time of Cæsar.