|Place of birth||Sydney New South Wales|
|Address||58 Holdsworth Street, Woollahra, New South Wales|
|Age at embarkation||19|
|Next of kin||Father, Peter Gilligan, 58 Holdsworth Street, Woollahra, New South Wales|
|Previous military service||4th Battery Australian Field Artillery|
|Rank on enlistment||Gunner|
|Unit name||Field Artillery Brigade 1, Battery 2|
|AWM Embarkation Roll number||13/29/1|
|Embarkation details||Unit embarked from Sydney, New South Wales, on board Transport A8 Argyllshire on
|Rank from Nominal Roll||Sergeant|
|Unit from Nominal Roll||1st Field Artillery Brigade|
|Recommendations (Medals and Awards)||
For gallantry and devotion to duty at Howitzer Battery near Pr Adelles on night of 11-12 June 1918.
|Fate||Returned to Australia
'For Gallantry and Devotion to duty at a Howitzer Battery position near PRADELLES on the night of 11/12th June, 1918. A gun team of horses was on the position for the purpose of withdrawing a gun, when enemy suddenly opened heavy fire on the position causing casualties to personnel. Ammunition was set on fire and there was great danger of an explosion, but with great coolness and promptitude Sergeant GILLIGAN led a party of men and directed the rescue of the wounded and ordered the immediate withdrawal of the horses. His action undoubtedly prevented serious losses to personnel and equipment, and set a magnificent example to the men under him.'
War service: Egypt, Gallipoli, Western FrontMedals: Military Medal, 1914-15 Star, British War Medal, Victory Medal