Jackson joined the
Honourable Artillery Company on his 18th birthday. He was assigned to an anti-aircraft battery and overstayed a period of leave. He was sentenced to a period of detention at
Wellington Barracks, run by the
Irish Guards. He was impressed by their high standards and applied for a transfer but was rejected. Jackson deserted and joined a group of itinerant Irish labourers, eventually making his way to
Glasgow. When one of them, named John Patrick Kenneally, returned to Ireland, Jackson obtained his identity card and, adopting the man's name, used it to enlist in the Irish Guards. He was remembered in
Winston Churchill's famous broadcast speech on 13 May 1945 "Five years of War", as having defended Ireland's honour:"When I think of these days I think also of other episodes and personalities. I do not forget
Lieutenant-Commander Esmonde V.C., D.S.O., Lance-Corporal Kenneally, V.C.,
Captain Fegen V.C., and other Irish heroes that I could easily recite, and all bitterness by Britain for the Irish race dies in my heart. I can only pray that in years which I shall not see, the shame will be forgotten and the glories will endure, and that the peoples of the British Isles and of the British Commonwealth of Nations will walk together in mutual comprehension and forgiveness." In 1943, Kenneally had married Elsie Francis; they had two sons and a daughter. He finished his military career in the newly formed 1st Guards Parachute Battalion and later bought himself out of the army in July 1948 to be with his wife and children. ==Later life==