Countless ethnic groups and subgroups, from Ibernians to Huns, all occupied different regions, negotiating & sometimes warring much like Native American tribes, until..
And let's not forget the Moorish invasion of Spain.
Every invasion involved battle, plunder, rape, and subjugation.
Celtic women were landholders & never considered property in marriage. Virginity was not an expectation for marriage. Teutonic tribes appointed chieftains, but elders also gave counsel. Compare w Abrahamic religions.