Vatsa or Vamsa (IPA: [ʋɐt̪sɐ], Pali and Ardhamagadhi: Vaccha, IPA: [ʋɐtːʃʰɐ], literally "calf") was one of the sixteen Mahajanapadas (great kingdoms) of Uttarapatha of ancient India mentioned in the Aṅguttara Nikāya.
Vatsa or Vamsa (IPA: [ʋɐt̪sɐ], Pali and Ardhamagadhi: Vaccha, IPA: [ʋɐtːʃʰɐ], literally "calf") was one of the sixteen Mahajanapadas (great kingdoms) of Uttarapatha of ancient India mentioned in the Aṅguttara Nikāya.
Kosala (IPA: [koːɕɐlɐ]), sometimes referred to as Uttara Kosala (lit. 'Northern Kosala') was one of the Mahajanapadas of ancient India. It emerged as a small state during the Late Vedic period and became (along with Magadha) one of the earliest states to transition from a lineage-based society to a monarchy. By the 6th century BCE, it had consolidated into one of the four great powers of ancient northern India, along with Magadha, Vatsa, and Avanti.
Kosala belonged to the Northern Black Polished Ware culture (c. 700–300 BCE) and was culturally distinct from the Painted Grey Ware culture of the neighboring Kuru-Panchala region, following independent development toward urbanisation and the use of iron. The presence of the lineage of Ikshvaku—described as a raja in the Ṛgveda and an ancient hero in the Atharvaveda—to which Rama, Mahavira, and the Buddha are all thought to have belonged—characterized the Kosalan realm.
Kosambi (Pali) or Kaushambi (Sanskrit) was an ancient city in India, characterized by its importance as a trading center along the Ganges Plain and its status as the capital of the Vatsa Kingdom, one of the sixteen mahajanapadas. It was located on the Yamuna River about 56 kilometres (35 mi) southwest of its confluence with the Ganges at Prayaga (modern Prayagraj), which made it a powerful center for trade and beneficial for the Vatsa Kingdom.
Udayana was a king of Vatsa in India, a contemporary of Gautama Buddha. He is a popular figure in Indian literature, for both his romantic and military stories, but though he probably existed, little is known for certain about his life or reign.
According to Buddhist sources, the Buddha visited Kauśāmbī several times during the reign of Udayana on his effort to spread the dharma, the Noble Eightfold Path and the Four Noble Truths. Udayana was an upasaka (lay follower) of Buddha. The Chinese translation of the Buddhist canonical text Ekottara Āgama states that the first image of Buddha, carved out of sandalwood, was made under the instruction of Udayana.
Pratijnayaugandharayana (Sanskrit: प्रतिज्ञायौगन्धरायणम्, Pratijñāyaugandharāyaṇam) (English: The Pledge of Minister Yaugandharāyaṇa) is a Sanskrit play in four acts written by the ancient Indian poet Bhāsa. It is the oldest extant political play of India and the prequel to Bhāsa's Svapnavasavadattam. These plays were written by Bhāsa on the account of Udayana, king of Vatsa (Kaushambi).
Throughout the play, Yaugandharayana, minister of Udayana, takes two vows which are ultimately fulfilled.