'For conspicuous good work and devotion to duty from 17th September to 11th November, 1918. During most of the period he acted as No. 1 of a Subsection. On one occasion when his gun was damaged by hostile shelling during a Barrage, he assisted the fitter to get it into action again, although he was himself slightly wounded, and the Battery was under hostile shell fire. Throughout the operations he was of the greatest assistance to his Battery Commander, and set a splendid example to all.'
Source: 'London Gazette'
Date: 20 August 1919

Regimental number	7/1577
Address	289 Armagh Street, Christchurch
Marital status	Single
Next of kin	Mother, Mrs Margaret Calder, 21 Michie Street, Roslyn, Dunedin
Rank on embarkation	Corporal
Enlistment status	Volunteer
Unit name	New Zealand Expeditionary Force, 7th Reinforcements, Canterbury Mounted Rifles
Embarkation details	Unit embarked from Wellington on 10 October 1915
	The Mounted Rifles component of the 7th Reinforcements left New Zealand on 10 October 1915 on board two ships, 'Aparima' and 'Navua'. It is not possible from the Nominal Roll to determine on which ship an individual embarked.
Medals	Military Medal 'For conspicuous good work and devotion to duty from 17th September to 11th November, 1918. During most of the period he acted as No. 1 of a Subsection. On one occasion when his gun was damaged by hostile shelling during a Barrage, he assisted the fitter to get it into action again, although he was himself slightly wounded, and the Battery was under hostile shell fire. Throughout the operations he was of the greatest assistance to his Battery Commander, and set a splendid example to all.' Source: 'London Gazette' Date: 20 August 1919
Family/military connections	Brothers: 2/1760 Allan Douglas CALDER; 3/389 James Leodamus CALDER.
Other details	War service: Egypt, Western Front Medals: Military Medal, 1914-15 Star, British War Medal, Victory Medal
Miscellaneous details	Nominal Roll Vol. 1: Canterbury Mounted Rifles/Seventh