One hundred years ago on 21 October 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:
Our batteries relieved the batteries of the 108th A.F.A. in the early morning and found the battery positions a sea of mud and many guns hopelessly mired while the roads leading into the battery positions were completely blocked with over-turned guns, wagons, dead horses and mules and other supplies. Operation Order # 112 was issued today with reference to a readjustment of zones. Operation Order #113 was also issued with reference to barrages to be put on by our batteries.
3rd Canadian Divisional Artillery war diary records:
In accordance with O.O. 138 the 3rd. C.D.A. relieved the 108th. And 232nd. Army Brigades, RFA.
Visibility was good after 11.a.m. Aircraft were very active, enemy planes flying low well behind our lines, fired on some of our working parties. Many balloons were up on both sides. Artillery on both sides was active, our Heavies shelling BELLEVUE Spur and PASSCHENDAELE heavily.
No. of guns in action – 86 – 18-pdrs. 32 – 4.5” Hows.
Ammunition expended A.1722, AX.1683, BX.1230
5th Canadian Siege Battery, Canadian Artillery, Canadian Expeditionary Force was a sub-unit of 1st Canadian Heavy Artillery Group. Their war diary records:
We took over from the 55th Australian Battery. They had two guns in action and one to be mounted.
1st Canadian Heavy Artillery Group war diary records:
Barrages carried out at 07:00 and 13:30; 1007 rounds all calibers ? during the day. Harrassing and ? carried out intermittently during the day with 3098 rounds being expended.
General Officer Commanding, Royal Artillery, Canadian Corps war diary records:
Art'y Order #91 issue. Bdes. of 3rd C.D.A. relieved 108th and 232nd Army Bdes. R.F.A. 112th Siege Bty. R.G.A. relieved by 9th Canadian Siege Bty. 110th Heavy Bty. R.G.A. relieived by 1st Canadian Heavy Bty. 1/1 Kent Heavy Bty. R.G.A. relieved by 2nd Canadian Heavy Bty. 71st Siege Bty. R.G.A. relieved by 2nd Canadian Siege Bty. 16th H.A.G. relieved by 1st Cdn. H.A.G. 42nd H.A.G. relieved by 2nd Cdn. H.A.G. 55th Siege Bty. R.G.A. relieved by 5th Canadian Siege Bty. Our siege groups engaged wire, trenches and strong points. Counter battery work: two destructive shoots, 9 N.F. calls. 36 hostile btys. harrassed. Hostile art'y was very quiet against our bty. positions and roads.
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.