Democracy was stalled by the martial law that had been enforced by President Iskander Mirza, who was replaced by the army chief, General Ayub Khan. After adopting a presidential system in 1962, the country experienced exceptional growth until a second war with India in 1965 that led to an economic downturn and wide-scale public disapproval in 1967. Consolidating control from Ayub Khan in 1969, President Yahya Khan had to deal with a devastating cyclone that caused 500,000 deaths in East Pakistan.