After the British conquest of Bengal in 23 June 1757 and the over throwing and execution of Nawab Siraj ud-Daulah, considered as the last independent ruler of the region before regaining independence 200 years later, the Bengal Presidency was divided in British India in the year 1947, as East Bengal and West Bengal mainly on religious grounds. East Bengal allied itself with the newly formed Muslim state of Pakistan and became known as East Pakistan. However the relations between West Pakistan and East Pakistan were politically strained due to various issues of inequality, language, culture and a large distance of over 2000 kilometres between the two states separated by the foreign lands of India. The central power remained confined in West Pakistan, thus demand for total independent rule of East Pakistan begun. Following the Six point movement in 1966 led by Father of the Nation Sheikh Mujibur Rahman, the East Pakistan independence movement gained momentum.