Skeptics claim Exodus 15:3 contradicts numerous others that call God “the God of peace” (e.g., Rom. 15:33). The Bible tells us that God fought many wars for Israel to destroy wicked nations, and that He promises “the peace of God, which surpasses all understanding” (Phil. 4:7) to all who repent and trust the Savior. It is clear that Exod. 15:3 is a reference to war, while Rom. 15:33 simply refers to peace of mind.
Exodus 15:3 The Lord is a man of war; The Lord is His name.