Chandragupta dethroned the last Nanda ruler Dhananand and occupied Patliputra in 322 BC with the
Help of Kautilya (Chankya).
In 305 BC, Chandragupta Maurya defeated Selecus Nikator , who surrendered a vast territory
including Aria (heart ), Arachosia (Kandhar), Gedrosia (Baluchistan ) and
Paropanisade ( Kabul), inreturn for 500 elephants. According to treaty between
Chandragupta and Selecus, the HIndukush become boundry between their states.
Megasthenese was a
Greek ambassador sent to the court Chandragupta Maurya by Selecus Nikator.
Chandragupta became a jain and went to Chandragiri Hill,
Sravanbelgola (Karnataka) wit hBhadrabahu ,where he died by slow starvation
(Kaya – Klesha /Salekhan).
Under Chanragupta Maurya, for the first time ,the whole of Northern India was united.
Trade flourished , agriculture was regulated , weights and
measures were standardized and money came into use.
Taxation, sanitation and famine relief became the concerns
of the state.