Travels and Teaching OF BUDDHA

Gautama Buddha with his protector Vajrapani (here holding a flywisk). Gandhara, 2nd century CE.
For the remaining 45 years of his life, the Buddha is said to have traveled in the Gangetic Plain, in what is now Uttar Pradesh, Bihar and southern Nepal, teaching his doctrine and discipline to an extremely diverse range of people— from nobles to outcaste street sweepers, mass murderers such as Angulimala and cannibals such as Alavaka. This extended to many adherents of rival philosophies and religions. The Buddha founded the community of Buddhist monks and nuns (the Sangha) to continue the dispensation after his Parinirvāna (Pāli: Parinibbāna) or "complete Nirvāna", and made thousands of converts. His religion was open to all races and classes and had no caste structure. He was also subject to attack from opposition religious groups, including attempted murders and framings.

A Tang Dynasty (618–907 AD) Chinese silk landscape painting depicting the young Sakyamuni shaving his head. This is one of the earliest visual presentations of the Gautama Buddha in the history of painting
The sangha travelled from place to place in India, expounding the dharma. This occurred throughout the year, except during the four months of the vassana rainy season. Due to the heavy amount of flooding, travelling was difficult, and ascetics of all religions in that time did not travel, since it was more difficult to do so without stepping on submerged animal life, unwittingly killing them. During this period, the sangha would retreat to a monastery, public park or a forest and people would come to them.
The first vassana was spent at Varanasi when the sangha was first formed. After this, he travelled to Rajagaha, the capital of Magadha to visit King Bimbisara, in accordance with his promise after enlightenment. It was during this visit that Sariputta and Mahamoggallana were converted by Assaji, one of the first five disciples; they were to become the Buddha's two foremost disciples. The Buddha then spent the next three seasons at Veluvana Bamboo Grove monastery in Rajagaha, the capital of Magadha. The monastery, which was of a moderate distance from the city centre was donated by Bimbisara.
Upon hearing of the enlightenment, Suddhodana dispatched royal delegations to ask the Buddha to return to Kapilavastu. Nine delegations were sent in all, but the delegates joined the sangha and became arahants. Neglecting worldly matters, they did not convey their message. The tenth delegation, led by Kaludayi, a childhood friend, resulted in the message being successfully conveyed as well as becoming an arahant. Since it was not the vassana, the Buddha agreed, and two years after his enlightenment, took a two month journey to Kapilavastu by foot, preaching the dharma along the way. Upon his return, the royal palace had prepared the midday meal, but since no specific invitation had come, the sangha went for an alms round in Kapilavastu. Hearing this, Suddhodana hastened to approach the Buddha, stating "Ours is the warrior lineage of Mahamassata, and not a single warrior has gone seeking alms", to which the Buddha replied
That is not the custom of your royal lineage. But it is the custom of my Buddha lineage. Several thousands of Buddhas have gone by seeking alms
Suddhodana invited the sangha back to the royal palace for the meal, followed by a dharma talk, after which he became a sotapanna. During the visit, many members of the royal family joined the sangha. His cousins Ananda and Anuruddha were to become two of his five chief disciples. His son Rahula also joined the sangha at the age of seven, and was one of the ten chief disciples. His half-brother Nanda also joined the sangha and became an arahant. Another cousin Devadatta also became a monk although he later became an enemy and tried to kill the Buddha on multiple occasions.
Of his disciples, Sariputta, Mahamoggallana, Mahakasyapa, Ananda and Anuruddha comprised the five chief disciples. His ten foremost disciples were completed by the quintet of Upali, Subhoti, Rahula, Mahakaccana and Punna.
In the fifth vassana, the Buddha was staying at Mahavana near Vesali. Hearing of the impending death of Suddhodana, the Buddha went to his father and preached the dharma, and Suddhodana became an arahant prior to death. The death and cremation led to the creation of the order of nuns. Buddhist texts record that he was reluctant to ordain women as nuns. His foster mother Maha Pajapati approached him asking to join the sangha, but the Buddha refused, and began the journey from Kapilavastu back to Rajagaha. Maha Pajapati was so intent on renouncing the world that she led a group of royal Sakyan and Koliyan ladies, following the sangha to Rajagaha. The Buddha eventually accepted them five years after the formation of the Sangha on the grounds that their capacity for enlightenment was equal to that of men, but he gave them certain additional rules (Vinaya) to follow. This occurred after Ananda interceded on their behalf. Yasodhara also became a nun, with both becoming arahants.
During his ministry, Devadatta (who was not an arahant) frequently tried to undermine the Buddha. At one point Devadatta asked the Buddha to stand aside to let him lead the sangha. The Buddha declined, and stated that Devadatta's actions did not reflect on the Triple Gem, but on him alone. Devadatta conspired with Prince Ajatasattu, son of Bimbisara, so that they would kill and usurp the Buddha and Bimbisara respectively. Devadatta attempted three times to kill the Buddha. The first attempt involved the hiring of a group of archers, whom upon meeting the Buddha became disciples. A second attempt followed when Devadatta attempted to roll a large boulder down a hill. It hit another rock and splintered, only grazing the Buddha in the foot. A final attempt by plying an elephant with alcohol and setting it loose again failed. Failing this, Devadatta attempted to cause a schism in the sangha, by proposing extra restrictions on the vinaya. When the Buddha declined, Devadatta started a breakaway order, criticising the Buddha's laxity. At first, he managed to convert some of the bhikkhus, but Sariputta and Mahamoggallana expounded the dharma to them and succeeded in winning them back.
When the Buddha reached the age of 55, he made Ananda his chief attendant.