Hey y'all.

As some of you may know, (probably nobody, but hey), I'm doing the International Baccalaureate Extended Essay, and whilst I WAS going to be doing it on the Bactrians, there is simply not enough there, so I'm now doing the Teutoburg Forest. I am aware that this is right at the end of EB, but hey, you guys know your stuff.

So I was wondering, where did all the information for the Germani come from? (Language, names of Troops, Weapons, etc) I'd really like to know (preferably websites)