I don’t think I ever realized just how big and disastrous this battle was. Take the time to read the account. BTW we only get this detail account here in 2 Chronicles.
2 Chronicles 13:3 And Abijah set the battle in array with an army of valiant men of war, even four hundred thousand chosen men: Jeroboam also set the battle in array against him with eight hundred thousand chosen men, being mighty men of valour.
2 Chronicles 13:17 And Abijah and his people slew them with a great slaughter: so there fell down slain of Israel five hundred thousand chosen men.
Also curious about this covenant…
2 Chronicles 13:5 Ought ye not to know that the LORD God of Israel gave the kingdom over Israel to David for ever, even to him and to his sons by a covenant of salt?
even to him and to his sons by a covenant of salt? that is, a perpetual one, which was inviolable, and never to be made void; called so, because salt preserves from corruption and putrefaction, and because made use of in sacrifices offered when covenants were made; the Targum is,”as salt waters, which never lose their saltness.” (Gill)
This was the battle of 2 Kings, but one might describe this as a battle of God vs the false gods, if you read the text.
2Ch 13:6 Yet Jeroboam the son of Nebat, the servant of Solomon the son of David, is risen up, and hath rebelled against his lord.
2Ch 13:7 And there are gathered unto him vain men, the children of Belial, and have strengthened themselves against Rehoboam the son of Solomon, when Rehoboam was young and tenderhearted, and could not withstand them.
2Ch 13:8 And now ye think to withstand the kingdom of the LORD in the hand of the sons of David; and ye be a great multitude, and there are with you golden calves, which Jeroboam made you for gods.
2Ch 13:9 Have ye not cast out the priests of the LORD, the sons of Aaron, and the Levites, and have made you priests after the manner of the nations of other lands? so that whosoever cometh to consecrate himself with a young bullock and seven rams, the same may be a priest of them that are no gods.
2Ch 13:10 But as for us, the LORD is our God, and we have not forsaken him; and the priests, which minister unto the LORD, are the sons of Aaron, and the Levites wait upon their business:
2Ch 13:11 And they burn unto the LORD every morning and every evening burnt sacrifices and sweet incense: the shewbread also set they in order upon the pure table; and the candlestick of gold with the lamps thereof, to burn every evening: for we keep the charge of the LORD our God; but ye have forsaken him.
2Ch 13:12 And, behold, God himself is with us for our captain, and his priests with sounding trumpets to cry alarm against you. O children of Israel, fight ye not against the LORD God of your fathers; for ye shall not prosper.