Siege of Bethsura

I date the siege of Bethsura to 163bc. Anyone got a refinement on that? Early summer maybe? Relevant texts include 1 Maccabees 6:20, 2 Maccabees 13:1. Are there others?

In the year one hundred and forty-nine, Judas understood that Antiochus Eupator was coming with a multitude against Judea, And with him Lysias the regent, who had charge over the affairs of the realm, having with him a hundred and ten thousand footmen, five thousand horsemen, twenty-two elephants, and three hundred chariots armed with hooks.
(2 Maccabees 13:1-2)

So king Antiochus died there in the year one hundred and forty-nine. And Lysias understood that the king was dead, and he set up Antiochus his son to reign, whom he brought up young: and he called his name Eupator. Now they that were in the castle, had shut up the Israelites round about the holy places: and they were continually seeking their hurt, and to strengthen the Gentiles. And Judas purposed to destroy them: and he called together all the people, to besiege them. And they came together, and besieged them in the year one hundred and fifty, and they made battering slings and engines.(1 Maccabees 6:16-20)

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