Asamanjudu had a very bad habit.He used to dip peoples children in Ssarayu river and enjoying thier plight.people went sagara and explaned the atrocities od Asamanjudu. Sagara shunned asamanjudu from the country.
After some time ,Sagara wanted to do yagna.Asamanjas son wasamsumanthdu.He was very efficient.Plateau between Himalayas and Vindhya mountains was the right place to start the yagna.Amsumantha accompanied Sasgara in conducting Aswamedha yaga.indra came like ademon and stole theyagna aswam.Ruthvijas told Sagara that if yagnaswam was not brought back ,bad would happen.so,Sagara sent his 60000 sons in search of the horse.