Complex sentence: The Salii were first mentioned as a Frankish tribe from north of the Rhine, from near the Chamavi, who were allowed to move into Roman territory, starting with the delta island of Batavia, and then Toxandria.
Split into simpler sentences: The Salii were first mentioned as a Frankish tribe from north of the Rhine, from near the Chamavi. They were allowed to move into Roman territory, starting with the delta island of Batavia, and then Toxandria.