Gandhiji decided to launch a nationwide Satyagraha against the proposed Rowlatt Act in _____. 

Gandhiji decided to release a national Satyagraha in opposition to the proposed Rowlatt Act in 1919, because 

• It gave huge power to the British government while leaders had no powers.
• This law was passed in the Parliamentary even after the opposition by the Indians and other Indian leaders.
• It put political leaders in jail without any trial for three years.
• Thus,  the British Government can arrest any leader without any justice.