The Acra, with the meaning of "stronghold", was a place in Jerusalem thought to have had a fortified compound built by Antiochus Epiphanes, ruler of the Seleucid Empire, following his sack of the city in 168 BCE. The name Acra was also used at a later time for a city quarter probably associated with the by-then destroyed fortress, known in his time to Josephus as both Acra and "the lower city". The fortress played a significant role in the events surrounding the Maccabean Revolt, which resulted in the formation of the Hasmonean Kingdom. The "upper city" was captured by Judas Maccabeus, with the Seleucid garrison taking refuge in the "Acra" below, and the task of destroying this last enemy stronghold inside Jerusalem fell to Simon Maccabeus surnamed Thassi. Our knowledge about the Acra is based almost exclusively on the writings of Josephus, which are of a later date, and on the First and Second Books of Maccabees, which were written not long after the described events.

The Battle of Beth Zur was fought between the Maccabees led by Judas Maccabeus and a Seleucid Greek army led by Regent Lysias in October 164 BC at Beth Zur. According to the books of Maccabees, the rebels won the battle, although how significant this victory really was is disputed; it is possible the battle's result was inconclusive. Through a stroke of good fortune for the rebels, the days after the battle likely coincided with news of Seleucid King Antiochus IV Epiphanes's death reaching Judea; rather than continue the campaign, the Seleucid army and Lysias returned to the capital to handle the leadership transition. The Maccabees were able to capture Jerusalem soon after.