The Ten Lost Tribes were the ten of the Twelve Tribes of Israel that were said to have been exiled from the Kingdom of Israel after its conquest by the Neo-Assyrian Empire c. 722 BCE. These are the tribes of Reuben, Simeon, Dan, Naphtali, Gad, Asher, Issachar, Zebulun, Manasseh, and Ephraim — all but Judah, Benjamin, and some members of the priestly Tribe of Levi, which did not have its own territory.
Delegation of the Northern Kingdom of Israel, bearing gifts to the Assyrian ruler Shalmaneser III, c. 840 BCE, on the Black Obelisk, British Museum.