Would you please give a brief account regarding his life after Sakyamuni attained Buddhahood?

There are different versions regarding the age at which Sakyamuni attained enlightenment, some quote it as thirty and some as thirty-five. For fifty (or forty-five) years after that, until the end of his life at the age of 80, he never stopped preaching his doctrine. He traveled widely, preaching to the public the truth he had perceived. At the outset, he went to Benares (P.Baranasi) to look for his five departed followers and preached the truth to them. The first sermon of the Buddha is called “the initial turning of the wheel of Dhamma”(S.Dharmacakra pravartana, P.Dhammacakkappavattana) in Buddhism.