'Armies' in the Bible

"All who were numbered of the camp of Reuben were one hundred fifty-one thousand four hundred fifty, according to their armies. They shall set out second.

These are those who were numbered of the children of Israel by their fathers' houses. All who were numbered of the camps according to their armies were six hundred three thousand five hundred fifty.

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.

The standard of the camp of Reuben went forward according to their armies. Elizur the son of Shedeur was over his army.

The standard of the camp of the children of Ephraim set forward according to their armies. Elishama the son of Ammihud was over his army.

The standard of the camp of the children of Dan, which was the rear guard of all the camps, set forward according to their armies. Ahiezer the son of Ammishaddai was over his army.

Thus were the travels of the children of Israel according to their armies; and they went forward.

These are the journeys of the children of Israel, when they went forth out of the land of Egypt by their armies under the hand of Moses and Aaron.