Further, the acts of Leo III. in 733 are unanimously viewed by historians as having a large effect in the deliverance of Italy from the eastern sovereignty, and his arrogation of the power to sever from the Pope, patriarch, a large extent of provinces is viewed no less as a prelude to the great schism between the East and West. The remaining years of Gregory III. are filled up with his embarrassing position between the Lombard duchies of Benevento and Spoleto and Liutprand aiming at uniting Italy in a Lombard monarchy, whereby the Pope should become his subject as before he had been a subject of the Goths. From the moment when king Liutprand resumed more decidedly his plan against the Greek possessions and therefore against the duchy of Rome, he was bound to endeavour to end the independence of the two outlying Lombard duchies. But at the same time the alliance between these duchies and the papacy became a political necessity. In the year 738 Liutprand took the field. He began with incursions into the territory of Ravenna, and invited the dukes of Spoleto and Benevento to attack the duchy of Rome. They refused, since, as Pope Gregory III. in one of his letters informs us, they had declared that they would not take the field against God’s holy Church and her people, with whom they had entered into covenant. Thereupon the king made war against his disobedient liegemen. While he laid waste the possessions of the Church in the territory of Ravenna, he sat down before Spoleto in the spring of 739 with a considerable force. Duke Thrasimund could not resist and fled to Rome. In June the king entered Spoleto. He compelled Benevento to receive his nephew Gregory for duke. At the same time he drew the exarch to his interest, to whom the Pope’s independence had long been odious. The confused accounts of annalists and historians make it difficult, if not impossible, to establish particular events in chronological accuracy. And the greatest uncertainty lies upon one of these events which is of particular importance, since it would secure for us an adequate reason for the Pope’s conduct. Liutprand is said immediately after the taking of Spoleto to have appeared before Rome, demanding that the fugitive duke should be delivered up to him. Encamped in the meadows of Nero, beside the Vatican, he plundered St. Peter’s, laid waste the neighbourhood, and made many Romans prisoners. It is certain that he took four cities in the Tuscan part of the Roman duchy, Amelia, Ortes, Bomarzo, and Bleda, as hostages for Duke Thrasimund.