>>213980184
So what ? You think German tribes were united or what ? Even 500 years later there were Frankish factions who chose to fight for Attila. The Franks who built France chose Rome's side, the Salian Franks. And here we're just talking about the Franks.
Before Julius Caesar it's very difficult to differentiate who was who because they were pretty much the same. Like with them, we don't know if they were Celtic or Germanic