The disposition of the army of Israel, and then asking counsel from the Lord, is a sweet token for good. And, as the Lord appointed Judah to lead, who doth not see shadowed out in this, the early tokens of that war, which the Lord fights for his people against sin and Satan; and Jesus, who according to the flesh, sprang out of Judah, going before, Hebrews 7:14.
Judges 20:14-18
14 But the children of Benjamin gathered themselves together out of the cities unto Gibeah, to go out to battle against the children of Israel.
15 And the children of Benjamin were numbered at that time out of the cities twenty and six thousand men that drew sword, beside the inhabitants of Gibeah, which were numbered seven hundred chosen men.
16 Among all this people there were seven hundred chosen men lefthanded; every one could sling stones at an hair breadth, and not miss.
17 And the men of Israel, beside Benjamin, were numbered four hundred thousand men that drew sword: all these were men of war.
18 And the children of Israel arose, and went up to the house of God, and asked counsel of God, and said, Which of us shall go up first to the battle against the children of Benjamin? And the LORD said, Judah shall go up first.