'February 26th to September 29th, 1917. This Officer has served in the New Zealand Trench Mortars since the formation of the Batteries and has always shown great energy and bravery. His preparation for the Messines Battle was very thorough, mortars being well placed and plenty of ammunition brought to the front. The enemy's retaliatory fire was severe, two pits were destroyed, but Captain Joplin in all cases fired his allotment of ammunition and completed his tasks. He himself is always to be seen in the most exposed positions cheering his men up. The good work done by the heavy Trench Mortars is largely due to him.'
Source: 'London Gazette'
Date: 28 December 1917

'For distinguished and gallant services and devotion to duty during the period 16th September 1918, to 15th March 1919.'
Source: 'London Gazette'
Date: 11 July 1919

Regimental number	10/2813
Address	Wadestown, Wellington
Marital status	Single
Next of kin	Father, C R Joplin, Wadestown, Wellington
Rank on embarkation	Lieutenant
Enlistment status	Volunteer
Unit name	New Zealand Expeditionary Force, 7th Reinforcements, Wellington Infantry Battalion
Embarkation details	Unit embarked from Wellington on 10 October 1915
	Members of the Wellington Infantry Battalion, 7th Reinforcements, left New Zealand on board three ships ('Aparima', 'Navua', and 'Warrimoo'). It is not possible from the Nominal Roll to determine on which ship an individual embarked.
Medals	Mention in Despatches 'February 26th to September 29th, 1917. This Officer has served in the New Zealand Trench Mortars since the formation of the Batteries and has always shown great energy and bravery. His preparation for the Messines Battle was very thorough, mortars being well placed and plenty of ammunition brought to the front. The enemy's retaliatory fire was severe, two pits were destroyed, but Captain Joplin in all cases fired his allotment of ammunition and completed his tasks. He himself is always to be seen in the most exposed positions cheering his men up. The good work done by the heavy Trench Mortars is largely due to him.' Source: 'London Gazette' Date: 28 December 1917 Mention in Despatches 'For distinguished and gallant services and devotion to duty during the period 16th September 1918, to 15th March 1919.' Source: 'London Gazette' Date: 11 July 1919
Miscellaneous details	Nominal Roll Vol. 1: Wellington Infantry Batln/Seventh