▁A vent icum . ▁First ▁incorpor ated ▁into ▁the ▁Roman ▁province ▁of ▁Gall ia ▁Belg ica , ▁later ▁into ▁the ▁Germania ▁Super ior ▁and ▁finally ▁into ▁the ▁Dioc let ian ▁province ▁of ▁ ▁Max ima ▁Se qu an orum , ▁the ▁former ▁territ ories ▁of ▁the ▁Hel vet ii ▁and ▁their ▁inhabitants ▁were ▁as ▁thoroughly ▁roman ised ▁as ▁the ▁rest ▁of ▁Ga ul . ▁▁ ▁The ▁rising ▁of ▁ 6 8 / 6 9 ▁AD ▁ ▁What ▁seems ▁to ▁have ▁been ▁the ▁last ▁action ▁of ▁the ▁Hel vet ii ▁as ▁a ▁trib al ▁entity ▁happened ▁shortly ▁after ▁the ▁death ▁of ▁em peror ▁N ero ▁in ▁ 6 8 ▁AD . ▁Like ▁the ▁other ▁Gall ic ▁tribes , ▁the ▁Hel vet ii ▁were ▁organ ised ▁as ▁a ▁civ itas ; ▁they ▁even ▁retained ▁their ▁traditional ▁grouping ▁into ▁four ▁pag i ▁and ▁enjoyed ▁a ▁certain ▁inner ▁aut onomy , ▁including ▁the ▁defence ▁of ▁certain ▁strong holds ▁by ▁their ▁own ▁troops . ▁In ▁the ▁civil ▁war ▁which ▁followed ▁N ero ’ s ▁death , ▁the ▁civ itas ▁Hel vet ior um ▁supported ▁Gal ba ; ▁una ware ▁of ▁his ▁death , ▁they ▁refused ▁to ▁accept ▁the ▁authority ▁of ▁his ▁rival , ▁Vit elli us . ▁The ▁Leg io ▁XX I ▁Rap ax , ▁station ed ▁in ▁V ind on issa ▁and ▁favour ing ▁Vit elli us , ▁st ole ▁the ▁pay ▁of ▁a ▁Hel vet ian ▁g arrison , ▁which ▁prompt ed ▁the ▁Hel vet ians ▁to ▁intercept ▁Vit elli an ▁mess engers ▁and ▁det ain