Answer:
After the decline of Harappan civilization around 1900 BCE, Aryan India saw the rise of many small kingdoms. As rulers used up their resources fighting one another for wealth and power, however, these kingdoms weakened. Around 322 BCE, a nobleman named Chandragupta Maurya took advantage of this situation and overthrew the unpopular ruler of an eastern kingdom called Magadha. Over the next 24 years, Chandragupta's army of 9,000 elephants and 700,000 soldiers conquered all of northern India.
Step-by-step explanation: