These maps are by no means complete, neither can they be. However they generally represent the origins of what are later known as the Germanic tribes, and how and when they moved across Europe into their modern homelands.
The initial Assyrian captivity:
The spread into Anatolia
The spread into Persia
Scythians of the Steppe
Galatae, or Galatians, and Kimmeroi, or Cimmerians
The Kelts, or Celts
Scythians in Europe
The Germans, as the "authentic" Galatae (Scythians) were later called by the Romans
All images thanks to TDog from the Radio Aryan chat. I apologize for the delay, they should have been posted here perhaps two years ago.