In March 1940, he joined the Canadian Army 19^th Field Regiment of the Royal Canadian Artillery (RCA) .

By the end of D-Day June 6^th, 1944, some 14,000 Canadians had landed in Normandy. Casualties numbered 1,074 of which 359 were fatal. Not all RCA regiments landed on D-Day but not long after they were all in France.

In the weeks after D-Day, the level of artillery action in Normandy was unprecedented. In what was relatively a small area both sides bombarded each other relentlessly for three months, each trying to overwhelm the other by sheer firepower.

The conditions under which troops had to exist were horrific. There was near constant terror of being hit by incoming shells; prolonged lack of sleep; boredom; weakness from dysentry; sudden and gruesome deaths of close friends; and severe physical privation and mental anguish. In the face of all this, men were called upon to perform heroic acts of bravery and they did. However, Rhindress Grant survived the action in Normandy and was involved in most of the six campaigns after D-Day before the Germans surrendered at a schoolhouse in Rheims on May 5^th, 1945.

There was the capture of Caen, the closing of the Falaise Gap, clearing the coastal ports, the Battle of the Scheldt, the liberation of Holland and the Battle of the Rhineland. Captain Rhindress Grant survived them all and was awarded the Military Cross (MC) for conspicuous gallantry against the enemy in the field.