<Li> Neolithic, c. 7600--c. 3300 BCE </Li> <Li> Bronze Age, c. 3300--c. 1200 BCE </Li> <Li> Iron Age, c. 1200--c. 200 BCE <Ul> <Li> Janapada, c. 1200 - c. 600 BCE </Li> <Li> Northern Black Polished Ware, c. 700 - c. 200 BCE </Li> <Li> Pundra Kingdom, c. 700 - c. 200 BCE </Li> </Ul> </Li> <Ul> <Li> Janapada, c. 1200 - c. 600 BCE </Li> <Li> Northern Black Polished Ware, c. 700 - c. 200 BCE </Li> <Li> Pundra Kingdom, c. 700 - c. 200 BCE </Li> </Ul>

Who was heading indian army during bangladesh liberation of 1971