Sentence:  After the Conquests made by "Caesar" upon "Gaul", and the nearer Parts of "Germany" ... great Numbers of "Germans" and "Gauls" resorted to the "Roman" Armies and to the City it self, and <WSD>habituated</WSD> themselves there, as many "Spaniards", "Syrians", "Graecians" had done before upon the Conquest of those Countries. 
Meaning of the word marked with <WSD> tags:  To settle as an inhabitant.