One of the common features frequently claimed in modern historiography is that the Lombard state was a comparatively weak one, and that the reasons for this weakness are to be found in the selfish interests of the powerful Lombard duces. These dukes were aristocrats and office holders, in charge of armies and responsible for the defence of the kingdom. Nonetheless, they frequently tried to enlarge their own power and territories at the expense of either other magnates or the king. To achieve their goals they did not even hesitate to defect to the Lombard's enemies. Both externally and internally, the interests of the Lombard kingdom could only be secured through the maintenance of strong armies. Leadership of these troops fell in the sphere of responsibility of either the king or the duces or gastaldi. Ruling Lombard Italy therefore, demanded that one deal with the interwoven interests of all involved and powerful magnates on the one hand, and to secure the territory against foreign enemies on the other. Furthermore, the presence of Byzantine administration and military promoted insurgencies by paying and supporting ambitious Lombard lords who were willing to change sides for their own benefit. The entanglement of different players on Italian territory was even broader as there were also Frankish and Papal intentions to gain as much power in Italy as possible.