Meaning
"Yahweh is a man of war:
Yahweh is his name" (Ex 15:3).
In early Israel the character of Yahweh as the war-God forms a prominent feature in the conception of God (Num 10:35, Num 21:14, Josh 5:13, Josh 10:11, Judg 5:4, Judg 5:13, Judg 5:20, Judg 5:23, Judg 5:31, etc.).
See GOD, NAMES OF, III, 8, LORD OF HOSTS; and HDB, V, 635 ff.