100 Years Ago Today on 29 May 1917

​One hundred years ago on 29 May 1917
31st Battery, Canadian Field Artillery, Canadian Expeditionary Force was a sub-unit of the 9th Canadian Field Artillery Brigade in the 3rd Canadian Division. The 9th Brigade war diary records:
Visibility Indifferent. Considerable  movement has been observed in enemy Lines to-day, and several parties have been dispersed by our 18-pdr. Batteries.
 
5th Canadian Siege Battery, Canadian Artillery, Canadian Expeditionary Force war diary records:
Nil
 
The 15th Field Artillery Regiment RCA perpetuates the following sub units:
31st Battery, Canadian Field Artillery, Canadian Expeditionary Force,
5th Canadian Siege Battery, Canadian Artillery, Canadian Expeditionary Force,
68th Battery, Canadian Field Artillery, North Russia Expeditionary Force, was not authorized to be formed until 3 August 1918, and
85th Battery, Canadian Siberian Expeditionary Force was not authorized to be formed until 12 July 1918.