In ancient India from the 6th century BCE onwards, the kingdom of Magadha (6th century BCE to 4th century BCE) made a mark for itself. Located in the eastern part of India in what is today the state of Bihar, it outshone other kingdoms and republics when it came to territorial expansion and control, which was the main reason and context for its incessant wars. The period of expansion and wars started from the reign of Bimbisara (543 BCE) and lasted until the fall of Dhanananda (322/321 BCE), when the Mauryans took over.
This is a companion discussion topic for the original content at https://www.worldhistory.org/article/1213/kingdom-of-magadha-wars-and-warfare/.