When Alexander invaded India, who among followings were the rulers of Magadha?

When Alexander the Great invaded north-west India between 327 and 325 BCE, the Nanda dynasty was ruling the Magadha Empire [5]. Specifically, the last Nanda ruler, Dhana Nanda (also referred to as Dana Nanda), was on the throne during this period [3]. Historical accounts indicate that Alexander's army was aware of the formidable military strength of the Nandas in the east, which contributed to their reluctance to advance further beyond the Beas River [3]. The Nanda dynasty ruled Magadha from approximately 345 BCE to 322 BCE . It was only after Alexander's departure and subsequent death that Chandragupta Maurya, with the assistance of Kautilya, overthrew the Nandas to establish the Mauryan Empire around 322-321 BCE [4]. Therefore, at the precise time of the invasion, the Nandas were the dominant power in Magadha.

Sources

1. [3] https://en.wikipedia.org/wiki/Nanda_Empire
2. [5] Exploring Society:India and Beyond ,Social Science-Class VII . NCERT(Revised ed 2025) > Chapter 5: The Rise of Empires > The Mighty Mauryas > p. 98
3. [1] History , class XI (Tamilnadu state board 2024 ed.) > Chapter 4: Emergence of State and Empire > 4.4 Alexander's Invasion > p. 49
4. [2] History , class XI (Tamilnadu state board 2024 ed.) > Chapter 6: Polity and Society in Post-Mauryan Period > The Beginnings > p. 77
5. [4] History , class XI (Tamilnadu state board 2024 ed.) > Chapter 4: Emergence of State and Empire > SUMMARY > p. 61