What does 1 Kings 9:18 mean?

This is the reason of the levy which king Solomon raised, to build Yahweh’s house, his own house, Millo, Jerusalem’s wall, Hazor, Megiddo, and Gezer.

Pharaoh king of Egypt had gone up, taken Gezer, burned it with fire, killed the Canaanites who lived in the city, and given it for a wedding gift to his daughter, Solomon’s wife.

Solomon built in the land Gezer, Beth Horon the lower,

all the storage cities that Solomon had, the cities for his chariots, the cities for his horsemen, and that which Solomon desired to build for his pleasure in Jerusalem, and in Lebanon, and in all the land of his dominion.

As for all the people who were left of the Amorites, the Hittites, the Perizzites, the Hivites, and the Jebusites, who were not of the children of Israel;

their children who were left after them in the land, whom the children of Israel were not able utterly to destroy, of them Solomon raised a levy of bondservants to this day.