 He also had manpower to draw on from north of the Sava River and from traditional recruiting grounds in the Dalmatian interior.Perhaps most important of all, and the source of the "well-equipped" phrase is that Marcellinus had within his region the Imperial arms factory of Dalmatia and a naval arsenal at Salona and access to mining resources of lead in Domavia and iron in the Sava Valley.Due to the geography of Dalmatia which deterred approach from land (for the coastal cities), and his control of the Adriatic Marcellinus was quite unassailable which allowed him to become very active in major areas of the West.