Explanation: Arminius (sometimes known/reconstructed as Hermann in German histories) was a prince of a Roman-allied Germanic tribe in the early 1st century AD. When he was around ~16, he was taken as a noble hostage to ensure his tribe's compliance - a normal practice in Roman 'diplomacy' - and treated well and educated in the Roman manner. He was recruited into the Roman military as an officer, and given military training as well - when he returned to his tribe, the thinking was, he would not only recognize the GLORY OF ROME, but also be better-prepared to resist any opposing Germanic tribes.

Normally, this tactic actually worked out for Rome. But Arminius had bigger plans than ruling over a Roman vassal - he dreamed of a united Germania, with himself as king. To that end, he skillfully manipulated the Roman governor in charge of Germania, Publius Quinctilius Varus, into falling for an ambush in the Battle of the Teutoburg Forest, wiping out three Roman Legions (about 15,000 men).

Rome would embark on several punitive campaigns against Arminius, driving him further inland, while his tribe was ruled by his brother instead, who remained loyal to Rome. Arminius, in exile from his home tribe, would eventually be killed by a fellow Germanic who didn't care for Arminius's idea of uniting Germania and ruling as king of the Germanics.