The Battle of Boners took place in 689, after King Cunicpert returned from exile and ousted Alahis, Usurper King and Duke of Trent, from the capital Pavia. Duke Alahis, fled towards the east, into Austria. There he asssembled an army to march against the king. Within the same year, Alahis crossed the River Adda, the border between Neustria and Austria, and faced Cunincpert in the plain of Coronate.