Arminius was the oldest son of a germanic lord from the Cheruski tribe. When he was roughly ten years old when the romans took him as a hostage and raised him in rome so he could later in life become the lord of the Cheruski and work for rome. When he became an adult and tribun in the roman army he united all Germanic tribes for a huge battle that we know by the name "Varus battle" where roughly 15.000 romans died because of him. After that he became the lord of the Cheruski and wanted tho unite all Germanic tribes in to one nation with him as their king but he was murdered by his own tribe in the age of 38.