When Rehoboam arrived in Jerusalem, he mobilized the house of Judah and Benjamin—180,000 chosen warriors—to fight against Israel and restore the kingdom to Rehoboam.
KJV
And when Rehoboam was come to Jerusalem, he gathered of the house of Judah and Benjamin an hundred and fourscore thousand chosen [men], which were warriors, to fight against Israel, that he might bring the kingdom again to Rehoboam.
ASV
And when Rehoboam was come to Jerusalem, he assembled the house of Judah and Benjamin, a hundred and fourscore thousand chosen men, that were warriors, to fight against Israel, to bring the kingdom again to Rehoboam.