Some citations from Rig Veda
1 100 18 He, much invoked, hath slain Dasyus and Śimyus, after his wont, and laid them low with arrows. The mighty Thunderer with his fair-complexioned friends won the land, the sunlight, and the waters.
9 73 5 O'er Sire and Mother they have roared in unison bright with the verse of praise, burning up riteless men, Blowing away with supernatural might from earth and from the heavens the swarthy skin which Indra hates.
Vishnu assists him in the fight with Vrtra - but Vrtra is a metaphor and not a non-Arya human enemy.
Is Indra the supreme warrior leader of the Rigvedic Aryas?