Premiership of Sheikh Mujibur Rahman

The premiership of Sheikh Mujibur Rahman began on January 12 of 1972 when he was sworn in as the Prime minister after briefly serving as the President after returning from Pakistan's jail on January 10, 1972. Sheikh Mujibur Rahman served as the Prime Minister of Bangladesh until January 25, 1975, for three years, and later led the parliament to adopt an amendment of the constitution that made him the President of Bangladesh.

Source: Wikipedia — Premiership of Sheikh Mujibur Rahman (CC BY-SA 4.0)