Chronicles II 13:15

15 And the men of Juda shouted: and it came to pass, when the men of Juda shouted, that the Lord smote Jeroboam and Israel before Abia and Juda.

Chronicles II 13:15 Meaning and Commentary

2 Chronicles 13:15

Then the men of Judah gave a shout
Taking heart at the sound of the trumpets, and in order to encourage one another, and intimidate the enemy; (See Gill on 1 Samuel 17:20),

and as the men of Judah shouted, it came to pass, that God smote
Jeroboam and all Israel before Abijah and Judah;
possessed them with a panic, so that they fled at once, as follows.

Chronicles II 13:15 In-Context

13 Now Jeroboam had caused an ambush to come round upon him from behind: and he was before Juda, and the ambush behind.
14 And Juda looked back, and, behold, the battle against them before and behind: and they cried to the Lord, and the priests sounded with the trumpets.
15 And the men of Juda shouted: and it came to pass, when the men of Juda shouted, that the Lord smote Jeroboam and Israel before Abia and Juda.
16 And the children of Israel fled from before Juda; and the Lord delivered them into their hands.
17 And Abia and his people smote them with a great slaughter: and there fell slain of Israel five hundred thousand mighty men.

The Brenton translation of the Septuagint is in the public domain.