1. Ewen Sinclair-MacLagan was later seconded to the Australian Army and served with the Australian Imperial Force during the First World War.

1. Ewen Sinclair-MacLagan was later seconded to the Australian Army and served with the Australian Imperial Force during the First World War.
Ewen Sinclair-MacLagan retired in 1925 and died in Dundee, Scotland at the age of 79.
Ewen Sinclair-MacLagan attended the United Services College in North Devon, England, where Rudyard Kipling was one of his classmates.
Ewen Sinclair-MacLagan served in British India and participated in campaigns in the Waziristan region.
In 1901, Ewen Sinclair-MacLagan was seconded to the Australian Army and served as adjutant of the New South Wales Scottish Rifles.
Ewen Sinclair-MacLagan accepted the position and returned to Australia as a temporary lieutenant colonel in January 1911.
Ewen Sinclair-MacLagan selected Sinclair-MacLagan to be the commander of 3rd Brigade, 1st Division.
Ewen Sinclair-MacLagan was the only brigade commander of the division to be a professional soldier.
Ewen Sinclair-MacLagan oversaw the training of the brigade, most of whom were miners, in the Middle East.
Ewen Sinclair-MacLagan's brigade was selected to be the lead element of the division when it landed at Gallipoli on 25 April 1915.
Ewen Sinclair-MacLagan was promoted to temporary brigadier general around this time, dated back to 15 August 1914.
Ewen Sinclair-MacLagan resumed command of the brigade in January 1916, at which stage it was reforming in Egypt after being evacuated from Gallipoli.
Ewen Sinclair-MacLagan left his brigade in December 1916 to become commander of the AIF depots in England.
Ewen Sinclair-MacLagan was appointed a Companion of the Order of the Bath in February 1917 for his war service to date.
Ewen Sinclair-MacLagan returned to the Western Front in July 1917 when the commander of the 4th Division, Major General William Holmes, was killed shortly after the Battle of Messines.
Ewen Sinclair-MacLagan was to take over command of the division, which he would lead for the remainder of the war.
Ewen Sinclair-MacLagan led the Australian mission that assisted in the training of the II American Corps, American Expeditionary Forces, prior to its participation in the successful Battle of St Quentin Canal.
Ewen Sinclair-MacLagan received a number of awards for his wartime services.
Ewen Sinclair-MacLagan's time assisting the AEF was rewarded with the Army Distinguished Service Medal.
Ewen Sinclair-MacLagan received the Croix de guerre with palm from the French government, and the Commander's Cross of the Order of the White Eagle from the Serbian government.
Ewen Sinclair-MacLagan returned to duty with the British Army and served as commander of the 51st Division, a Territorial Army formation, before retiring from the army in 1925.
Ewen Sinclair-MacLagan retained a connection to the Australian Army through his honorary colonelcy of the 34th Battalion.
Ewen Sinclair-MacLagan succeeded General Sir Bruce Hamilton as colonel of the Border Regiment from August 1923 to 1936.
Ewen Sinclair-MacLagan died at the age of 79 in Dundee, Scotland on 24 November 1948.
Ewen Sinclair-MacLagan was survived by his daughter, the only child of his marriage to Edith Kathleen French, the daughter of George Arthur French.