The order of the tribes generally follows Numbers 1:5–15. It starts with Leah's six sons, then Rachel's two sons (Joseph's tribe is divided into Ephraim and Manasseh, followed by Benjamin), and then Bilhah's two sons (Dan and Naphtali). There are some changes:
Naphtali is moved to his location next to Zebulun
The tribe of Levi is added according to Levi's birth order, with Aaron's family (the priests) listed separately
The list does not include Zilpah's two sons, Gad and Asher