[n 1] Gallagher was promoted to lieutenant and shortly after, was seconded to the West African Frontier Force (WAFF) to serve in Argungu in Northern Nigeria, where he was repeatedly mentioned in dispatches for his gallantry.

[6][7][n 2] The DSO is typically awarded to officers ranked major (or equivalent) or higher, with exceptions demonstrating a high degree of gallantry, just short of deserving the Victoria Cross.

The opposing force of about five thousand poorly armed, but reportedly, fanatical supporters of a self-declared Mahdi had raised the standard of revolt at a town called Satiru 14 miles south of Sokoto.

[10] "F" company led the attack on 10 March, with Gallagher commanding the front face of a square with the intention of drawing the much larger enemy force in to the open.

At some point, Gallagher's company broke from the square, leading a bayonet charge into the southern part of the town, where he was wounded by an arrow that lodged in his elbow joint.

[14][15] Cyprus was a British protectorate consisting of mixed ethnic communities dominated by Greek Cypriots (up to 78%) emerging from rapidly waning Ottoman suzerainty.

From 1909 to 1914, the CMP held together the outward appearance of the Anglo-Ottoman administration in Cyprus, with around 700 Zaptiehs organised in both mounted and foot units initially dominated by the Turkish Cypriot minority.

[17][18] Three years of mounting resentment against Goold-Adams changed in November when the Ottomans joined the Central Powers at the outbreak of World War One, resulting in the complete annexation of Cyprus into the British Empire.

[26] He was appointed second in command of the 7th Battalion of the Royal Munster Fusiliers (7RMF) and assigned to the Macedonian front in October shortly after Bulgaria had invaded Serbia.

[26] A Canadian soldier attached to the 7RMF reported that after three days of bombardment from German artillery, they were forced to retreat "at a dead run" from the advancing Bulgarian charge.

[citation needed] He joined the 11th Battalion of the Worcestershire Regiment and was promoted to Major as second in command for an offensive on the Serbo-Greek frontier along a mountainous stretch north and northeast of Salonika, culminating in the Battle of Horseshoe Hill.

[41] Gallagher sought to block the recruitment, which set him against increasing pro-enosis agitation in Cyprus, making the CMP a target for unrest (ibid p122).

Post war, Gallagher had become increasingly involved as an administrator, indicated by his changing roles as a commissioner, a general registrar and as a member on both the Executive and Legislative Councils in 1922.

[49] In 1928, Gallagher published an article to commemorate 50 years of the CMP, describing it as "an armed military body", whilst placing the emphasis on local rural constabulary, "carefully but unobtrusively watching everything which transpires in the village" in support of crime prevention.

[19] The article shows a snapshot of a visible police force set up to maintain internal security, which was increasingly seen as the unacceptable face of colonial rule, an obvious target by those continuing to call for a stronger Greek national identity (Enosis).

[n 9] Later in the same year, the delicate balance of governance started to unravel when Greek Cypriots refused to take part in celebrations for the 50th Anniversary of colonial rule.

[9][28] He died in 1940, carried to his grave by those who had served under him, with a firing party of twelve constables and two sergeants in a lavish funeral attended by the Governor and the heads of almost every Government department in Cyprus.