The Ten Tragic Days was a military coup against President Francisco I. Madero, which lasted 10 days. This began on February 9, 1913, in Mexico City, and ended up overthrowing and assassinating President Madero.

Eastern Regional Crises of 1953 - As a result of the Eastern Regional elections of 1951, the NCNC formed the government of the region and Mr. Eyo Ita, the Deputy National President of the party was appointed Premier. Dr. Nnamdi Azikiwe, the National President of the NCNC remained only a member of the Western House of Assembly where the party formed the opposition.