Valmiki Ramayana Yuddha Kanda Sarga 79 Shloka 2

ततः then, प्लवङ्गानाम् Vanaras, निशाचरैः Rakshasas, देवेनाम् Devas, दानवैरिवDanavas, तत् there, सुहत् together, रोहर्षणम् one's hair stand to raise, युद्धम् battle, प्रवृत्तम् ensued

Then ensued a battle between Rakshasas and Vanaras whichcaused horripilation, just like the battle between Devas and Danavas.