- The slogan 'Inquilab Zindabad' was originally coined by the Urdu poet and freedom fighter Maulana Hasrat Mohani in 1921. - However, it was popularized by Bhagat Singh and his revolutionary comrades, particularly after they shouted it in the Delhi Assembly on April 8, 1929, and during subsequent trials. - Bhagat Singh's use of the slogan made it a rallying cry for the Indian independence movement.