The kingdom of Israel achieved its greatest territorial extent in Bible History during reign of King Solomon, the son and successor of King David. It included far more than just the traditional Dan to Beersheba of the lands west of the Jordan River today (see Bible Places). Solomon's kingdom also controlled a vast region east of the river in what is today the Kingdom of Jordan, and deep into the northeast, reaching far beyond the Golan Heights all the way to the Euphrates River. It was most certainly a very different Middle East than today.
Fact Finder: How many years did it take Solomon to built the original Temple in Jerusalem?
1 Kings 6:38
See also Temples and Layout Of Solomon's Temple