The phrase “crowded hour of glory” recurs through Montgomery’s descriptions of World War I heroes.

In Chapter 11 of Rilla of Ingleside, Rilla assists the war effort in many ways. Reciting at recruitment meetings is one of them.

One night Rilla came home late from a recruiting meeting at the Glen where she had been giving patriotic recitations. Rilla had never been willing to recite in public before. She was afraid of her tendency to lisp, which had a habit of reviving if she were doing anything that made her nervous. When she had first been asked to recite at the Upper Glen meeting she had refused. Then she began to worry over her refusal. Was it cowardly? What would Jem think if he knew? After two days of worry Rilla phoned to the president of the Patriotic Society that she would recite. She did, and lisped several times, and lay awake most of the night in an agony of wounded vanity. Then two nights after she recited again at Harbour Head. She had been at Lowbridge and over-harbour since then and had become resigned to an occasional lisp. Nobody except herself seemed to mind it. And she was so earnest and appealing and shining-eyed! More than one recruit joined up because Rilla’s eyes seemed to look right at him when she passionately demanded how could men die better than fighting for the ashes of their fathers and the temples of their gods, or assured her audience with thrilling intensity that one crowded hour of glorious life was worth an age without a name. Even stolid Miller Douglas was so fired one night that it took Mary Vance a good hour to talk him back to sense. Mary Vance said bitterly that if Rilla Blythe felt as bad as she had pretended to feel over Jem’s going to the front she wouldn’t be urging other girls’ brothers and friends to go.

Barry Dark has a “crowded hour of glory”, as described in Chapter 1, 6 of A Tangled Web

Donna Dark and Virginia Powell sat together as usual. They were first cousins, who were born the same day and married the same day,–Donna to her own second cousin, Barry Dark, and Virginia to Edmond Powell–two weeks before they had left for Valcartier. Edmond Powell had died of pneumonia in the training camp, but Barry Dark had his crowded hour of glorious life somewhere in France. Virginia and Donna were “war widows” and had made a solemn compact to remain widows for ever.

This poem is quoted in Sir Walter Scott’s book Old Mortality, available in full at Project Gutenberg

Old Mortality
Sir Walter Scott

Sound, sound the clarion, fill the fife!
To all the sensual world proclaim,
One crowded hour of glorious life
Is worth an age without a name.