Wen Bengal divided Bangladesh and West bengal???

Pakistan consisting West Pakistan and East Pakistan was divided and given independence in 1947, august 14. East Pakishtan, now Bangladesh was under Pakistan's rule and Bangladesh was formed in 1971, when the east Pakistan Province declared their independence on March 26. They warred with the central Pakistan government, and became financially separate later that year (December 16) with financial help from India. Eventually other countries recognized them and in 1974, they were admitted to the UN (United Nations). It was at this time that Pakistan finally acknowledged them and it was 1976 until China showed diplomatic recognition.-

Bengal was devided into two in 1947 -
West Bengal and East Pakistan.

In 1971 East Pakistan changed name to Banglades.

I got the following from Wikipedia:

During the partition of India after independence in 1947, the Bengal region was divided into two territories: East Bengal (present-day Bangladesh) and West Bengal.

East Bengal was made a part of Pakistan due its overwhelmingly large Muslim population (then more than 85%). In 1955, the government of Pakistan changed its name from East Bengal to East Pakistan.

However confrontations between East Pakistan and West Pakistan started soon after. In 1948, Jinnah declared that only Urdu would the official language of the entire nation while more than 95% of the population in East Pakistan spoke Bengali. When protests broke out in East Pakistan on February 21, 1952, Pakistani police fired on the protestors, killing hundreds of people.

East Pakistan was also given an inferior treatment by the federal government of Pakistan (situated in West Pakistan) and small funds were allocated for the development of the region, despite of it being significant contributor in the revenue generation. Therefore, a separatist movement started to grow in present day Bangladesh.

when India gained independence in 1947, Bengal was partitioned along religious lines. The western part of Bengal remained with India and was named West Bengal). The eastern part of Bengalt joined Pakistan as a province called East Bengal and was later renamed East Pakistan. East Pakistan became Bangladesh in 1971