1924 – Aguiyi-Ironsi was born in Umuahia, Nigeria on March 3, 1924.
1942 – Joined the Nigerian Army.
1948 – Became 2nd Lieutenant in the Royal West African Frontier Force.
1953 – Promoted to the rank of Captain.
1955 – Promoted to the rank of Major.
1960 – Promoted to the rank of Lieutenant Colonel.
1961 – Headed the Nigerian contingent in the United Nations Force.
1964 – Promoted to the rank of Major General and became the head of the Nigerian Army in February.
1966 – Became the first military Head of State of Nigeria after a military coup and commanded the Armed Forces. He was killed durin a coup d’etat that took place on July 29, 1966.