Career
He fought in the Irish War of Independence and then on the Anti-Treaty side during the Irish Civil War. He was an explosives expert and was imprisoned a number of times. He is best known for his collaboration with the Abwehr military intelligence of Nazi Germany.
Irish Republican Army
A native of County Roscommon, he was an explosives expert and reputedly invented the "Irish War Flour" (named after the flour sacks in which it was smuggled into Dublin aboard ships) and "Irish Cheddar" devices. He subsequently became IRA Director of Chemicals in 1921. During the Irish War of Independence he was imprisoned in Mountjoy and Kilmainham prisons and later interned in Newbridge, County Kildare.
He opposed the Anglo-Irish Treaty and fought in the Irish Civil War. In 1938, at the request of IRA chief of staff Seán Russell, he wrote the S-Plan, a bombing campaign targeting England. Involvement with Abwehr
As "Agent V-Held", he visited Germany three times in 1939 on behalf of the IRA. On 28 February he negotiated an arms and radio equipment delivery at the Abwehrstelle in Hamburg.
On 26 April he concluded a new arms deal with the Abwehrstelle and established with the help of a Breton a secret courier connection to Ireland via France. On 23 August, O'Donovan received the last instructions for the event of war. On 9 February 1940, Abwehr II agent Ernst Weber-Drohl landed at Killala Bay, County Sligo aboard U-37.
In 1940, he was involved in setting up Córas na Poblachta, a party which proved unsuccessful. O'Donovan died in Dublin in June, 1979.
