Numbers 10:12

When you go to war in your land against the adversary who oppresses you, then you shall sound an alarm with the trumpets. Then you will be remembered before the LORD your God, and you will be saved from your enemies.

“Also in the day of your gladness, and in your set feasts, and in the beginnings of your months, you shall blow the trumpets over your burnt offerings, and over the sacrifices of your peace offerings; and they shall be to you for a memorial before your God. I am the LORD your God.”

In the second year, in the second month, on the twentieth day of the month, the cloud was taken up from over the tabernacle of the covenant.

They first went forward according to the commandment of the LORD by Moses.

First, the standard of the camp of the children of Judah went forward according to their armies. Nahshon the son of Amminadab was over his army.

Nethanel the son of Zuar was over the army of the tribe of the children of Issachar.