Do you need references? There are too many.
In my original question there is a reference to Numbers 31, which you apparently missed.
However the OT is full of stories of wars, the Lord commands the children of Israel to make war on the peoples who inhabited the promised land, he sends to kill without mercy, men, women and children.
He calls himself Lord of Hosts.
He defines himself as jealous, vindictive and furious with his enemies.
The universal flood where all humanity (except 8 people) was exterminated, men, women, children, animals.
The law of an eye for an eye, a tooth for a tooth as opposed to the commandment to love your enemies.
Nahum 1:2 God is jealous, and the Lord revengeth; the Lord revengeth, and is furious; the Lord will take vengeance on his adversaries, and he reserves wrath for his enemies.
And only a few examples...
Exodus, 32:27
Leviticus, 26:27-29
Numbers, 25:9
Numbers, 31:17-18
Numbers, 31:31-40
Deuteronomy, 2:33-34
Deuteronomy, 3:6
Deuteronomy, 20:16
Deuteronomy, 28:53
Joshua, 6:21-27
Joshua, 7:19-26
Joshua, 10:32-33
Joshua, 11:20
1 Samuel, 15:7-8
2 Samuel, 24:15