“Moreover, Judas Maccabeus told them of the occasions when help came to their ancestors. There was once in the time of Sennacherib, when one hundred eighty-five thousand people perished. There was the time of the battle against the Galatians that took place in Babylonia, when eight thousand Jews fought along with four thousand Macedonians. When the Macedonians were hard pressed, the eight thousand, by the help that came to them from heaven, destroyed one hundred twenty thousand people. They took a great amount of booty.”
Judas Maccabeus recalled the great moments in Israelite battles. First there was the classic victory in 2 Kings, chapter 19, when King Hezekiah of Judah defeated and killed 185,000 troops of the Assyrian King Sennacherib, who was attacking Jerusalem around 700 BCE. This incident is often cited. However, the 2nd story about 8,000 Jews helping the Macedonians against the Galatians in Babylonia is only found here. Apparently the Galatians were mercenary troops in Asia. Apparently these Jewish troops helped King Antiochus III to defeat the Galatians in the time frame between 223-187 BCE. So that would have been only about a half-century earlier than Judas Maccabeus.