You can see where the above map fits on the one below--just under the word 'Prussia' on the larger yellow section. The country we know as Germany didn't exist till much later. All these little kingdoms and empires wanted more of their neighbors, and were willing to fight for them. In the meantime, our folks LEFT.
(Note: If you came here to research Otrembas, see the left side of the page--and click the name).
Lower map source.