NET

5 Amaziah assembled the people of Judah and assigned them by families to the commanders of units of 1,000 and the commanders of units of 100 for all Judah and Benjamin. He counted those twenty years old and up and discovered there were 300,000 young men of fighting age equipped with spears and shields.

Darby

5 And Amaziah gathered Judah together and arranged them according to the fathers' houses, according to the captains of thousands and the captains of hundreds, throughout Judah and Benjamin; and he numbered them from twenty years old and upwards, and found them three hundred thousand choice men, able for military service, that could handle spear and target.

KJV

5 Moreover Amaziah gathered Judah together, and made them captains over thousands, and captains over hundreds, according to the houses of [their] fathers, throughout all Judah and Benjamin: and he numbered them from twenty years old and above, and found them three hundred thousand choice [men, able] to go forth to war, that could handle spear and shield.