The Fort Garry Horse training at the charge.
Source page at fortgarryhorse.ca
Restoring the Infantry's Confidence
Herbert Hill; quoted in Guy Chapman, OBE, MC (Ed), Vain Glory; A miscellany of the Great War 1914-1918, 1937/1968
24th Mar. 
We were crouching down in the narrow trench talking casually of when we had had a square meal last, and what was more important, the chances of getting one in the near future, when a jingling sound made us look round. We stared incredulously as a crowd of horsemen emerged from the trees. They took no notice of our heads, bobbing up from the ground, and manoeuvred their mounts into some kind of order. They were Colonials, and their uniforms were spick and span. The horses snorted and their coats shone. The men were big fellows and their bronze faces were keen and oddly intent. They were very splendid compared to us…
We ducked in alarm as the squadron spurred their horse into a gallop and came straight at us. With a thunderous drumming of hoofs they took our trench in their stride. From the bottom, as I cowered down, I had a momentary glimpse of a horse's belly and powerful haunches as they were over and away like the wind, sword in hand.
They spread out as they went into two lines and were half-way across the open when there came a sudden pulsating blast of fire and gaps appeared in the double line. Bullets came hissing about our heads. A man a couple of yards away from me slithered down to his knees, and then sprawled full length on the floor of the trench. Realizing our danger we ducked. Looking down I saw blood gushing from a wound in his throat…
Then uncontrollable excitement possessed me and, defying the bullets, I raised my head and looked at the cavalry. Their ranks were much thinner now. Just as the foremost of them reached the trees they hesitated, turned and came racing back, Iying low in the saddle.
The machine-guns barked triumphantly at their victory over mere flesh and blood. Only a handful of the once proud squadron put their blowing horses at the trench and lunged across to the shelter of the wood behind. Others tailed away on either side and in a moment were hidden from view among the friendly trees.
The whole thing from when we saw them first had only occupied a bare five minutes. We stared at each other in amazement. The fire died down. Looking over the top we saw that the ground in front, which before had been bare, was dotted here and there with shapeless mounds.
The screams of horses in agony pierced our ears with shrill intensity. As we looked animals struggled convulsively to their feet and galloped off at a tangent. Some of them swayed drunkenly and fell back, with their legs in the air. Smaller, more feeble movements showed that some of the troopers were still alive.
Single rifle-shots sounded, whether from our side or not, I didn't know, and by and by the horses were mercifully silent, but men moved at intervals—crawling behind the horses for cover, perhaps.
Footnote: The charge near Villescle was made by 150 of the Fort Garry Horse, of whom 73 were casualties. The Official History states: "And the confidence of the infantry was restored.")
Survivors of the Squadron of the Fort Garry Horse returning to the Canadian lines.
See source page.