Marcus Livius Drusus Claudianus was a Roman politician and military leader during the late Roman Republic. He is best known for his role in the political turmoil of the 1st century BCE, particularly during the time of the Social War, which was a conflict between Rome and its Italian allies over citizenship rights. Drusus Claudianus was a member of the Livius family and served as a tribune of the plebs. His efforts to grant citizenship to non-Roman Italians were met with resistance, leading to his eventual assassination. His actions and fate reflect the intense political struggles of the era.