Magadha (IPA: [məɡəd̪ʰaː]) was a region and kingdom in ancient India, based in the eastern Ganges Plain. It was one of the sixteen Mahajanapadas during the Second Urbanization period. The region was ruled by several dynasties, which overshadowed, conquered, and incorporated the other Mahajanapadas. Magadha played an important role in the development of Jainism and Buddhism and formed the core of the Maurya Empire (c. 320–185 BCE).
General info from Wikipedia.org