Loyal North Lancashire Regiment
Col O'Brien was born in 1862 and commisioned on 5 September 1888. He retired from the Army on 26 June 1907 but was recalled on the outbreak of war in August 1914.
For the duration of the war, he served as Temporary Lieutenant Colonel, Garrison Battalion, Royal Scots Fusiliers.
Faces of the First World War
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Find out more about this First World War Centenary project at www.1914.org/faces.
This image is from IWM Collections.