When you are at war in your land, defending yourselves against an enemy who has attacked you, sound the signal for battle on these trumpets. I, the LORD your God, will help you and save you from your enemies.
Also on joyful occasions---at your New Moon Festivals and your other religious festivals---you are to blow the trumpets when you present your burnt offerings and your fellowship offerings. Then I will help you. I am the LORD your God."
and each time they moved, they were in the same order. Those under the banner of the division led by the tribe of Judah started out first, company by company, with Nahshon son of Amminadab in command.
Then the Levite clan of Kohath would start out, carrying the sacred objects. By the time they arrived at the next camp, the Tent had been set up again.
Finally, those under the banner of the division led by the tribe of Dan, serving as the rear guard of all the divisions, would start out, company by company, with Ahiezer son of Ammishaddai in command.
Moses said to his brother-in-law Hobab son of Jethro the Midianite, "We are about to start out for the place which the LORD said he would give us. He has promised to make Israel prosperous, so come with us, and we will share our prosperity with you."
When the people left Sinai, the holy mountain, they traveled three days. The LORD's Covenant Box always went ahead of them to find a place for them to camp.