Complex sentence: The Hasmoneans, also known as the Maccabees who were priests, (kohanim) from the Tribe of Levi, established a monarchy of their own in Judea following their revolt and war against the Hellenistic Seleucid dynasty.
Split into simpler sentences: The Hasmoneans, also known as the Maccabees were a priestly group (kohanim) from the Tribe of Levi. They established their own monarchy in Judea following their revolt and war against the Hellenistic Seleucid dynasty.