Uzziah‘s expedition was the natural sequel to the Edomite war of Amaziah 2 Chronicles 25:11, which crushed the most formidable of all the tribes of the south. On Jabneh see Joshua 15:11 note; and on Ashdod see Joshua 13:3 note.
Matthew Henry
Concise Bible Commentary
As long as Uzziah sought the Lord, and minded religion, God made him to prosper. Those only prosper whom God makes to prosper; for prosperity is his gift. Many have owned, that as long as they sought the Lord, and kept close to their duty, they prospered; but when they forsook God, every thing went cross. God never continues either to bless the indolent or to withhold his blessing from the diligent. He will never suffer any to seek his face in vain. Uzziah's name was famed throughout all the neighbouring countries. A name with God and good people makes truly honourable. He did not delight in war, nor addict himself to sports, but delighted in husbandry.
SDA Bible Commentary (limited)
Volume 1-7
6. Against the Philistines.Verses 6-15 deal with Uzziah’s military adventures, his public works, and his strength in arms. This section is found only in Chronicles and is an important contribution to information regarding the nature of Uzziah’s reign. It is thought that “Azriau of Iauda” in the Assyrian records was Azariah (Uzziah)of Judah. If so, these records (see on 2 Kings 14:28; 16:5) confirm the picture given in the Bible of Uzziah’s military importance.