In the days of yore, the Devas and the Danavas were always engaged in destroying one another. The fearful Danavas were always able to vanquish the Devas.
देवासुराः ए । यत्ता विनिघ्नन्तः परस्परम्। तत्राजयन् सदा देवान् दानवा घोररूपिणः॥