He had many supplies stored in the cities of Judah and an army of skilled warriors stationed in Jerusalem. ¹ 

These were their divisions by families: There were a thousand officers from Judah. ¹  Adnah the commander led 300,000 skilled warriors,

Abijah launched the attack with 400,000 well-trained warriors, ¹  while Jeroboam deployed against him 800,000 well-trained warriors. ² 

Asa had an army of 300,000 men from Judah, equipped with large shields and spears. He also had 280,000 men from Benjamin who carried small shields and were adept archers; they were all skilled warriors.