Answer
Odoacer seized power through a military coup, overthrowing the last Western Roman Emperor, Romulus Augustulus, in 476 CE. As a Germanic leader, Odoacer commanded a significant force of barbarian mercenaries who had served in the Roman army. Exploiting the empire's political instability and military weakness, Odoacer rallied his troops and marched on Rome, deposing the young emperor and establishing himself as the ruler of Italy.