During the 1st century CE, the Jewish Zealots in Judaea Province rebelled, killing prominent collaborators with Roman rule. In 6 CE, according to contemporary historian Josephus, Judas of Galilee formed a small and more extreme offshoot of the Zealots, the Sicarii ("dagger men"). Their efforts were also directed against Jewish "collaborators," including temple priests, Sadducees, Herodians, and other wealthy elites. According to Josephus, the Sicarii would hide short daggers under their cloaks, mingle with crowds at large festivals, murder their victims, and then disappear into the panicked crowds. Their most successful assassination was of the High Priest of Israel Jonathan.