Question: The fall of the first republic of nigeria took place on?
Disambiguated questions and answers: question: The fall of the first republic of nigeria due to a coup d'état took place on?
The fall of the first republic of nigeria due to Major-General Johnson Aguiyi-Ironsi taking control took place on?
answer: 15 January 1966
January 16, 1966
Natural Questions answer: 15 January 1966 (from the Wikipedia article "First Nigerian Republic")