1923 – Born on the 9th of February in inner-city Dublin, Ireland.
1937 – Became a member of Fianna Éireann, the youth organization of the IRA.
– Published his first poems and prose in the organization’s magazine Fianna: the Voice of Young Ireland.
1939 – Arrested in Liverpool in possession of explosives for use in the IRA S-Plan bombing campaign.
– Sentenced to three years in a reform school.
1942 – Behan was tried for the attempted murder of two detectives in Dublin and sentenced to fourteen years.
– He was sent to Mountjoy Prison and later to the Curragh Internment Camp.
1946 – Released as part of a general amnesty of republican prisoners.
1947 – Spent a short time in prison in Manchester for helping a fellow republican to escape from jail.
1954 – Wrote play The Quare Fellow, which was based on his experiences in jail, was produced in the Pike Theatre in Dublin.
1956 – The Quare Fellow opened in the Theatre Royal, Stratford, in a production by Joan Littlewood.
1958 – Wrote plays "The Hostage", autobiographical novel "Borstal Boy".
1964 – Died on the 20th of March.