In the first place went the standard of the camp of the children of Judah according to their armies: and over his host was Nahshon the son of Amminadab. The standard - of Judah - See this order of marching explained at large on Numbers 2 (note). The following is the order in which this vast company proceeded in their march: -
Judah Issachar Zebulun Gershonites, and Merarites carrying the tabernacle.
Reuben Simeon Gad The Kohathites with the sanctuary.
Ephraim Manasseh Benjamin
Dan Asher Naphtali.