It was the last year of WWI, but on May 22, 1918, nobody knew it yet. A big German push on Paris was in the works, according to the newspapers, and submarine warfare was sinking ships left and right.

“Aim at a high mark and you will hit it. No, not the first time, nor the second, and maybe not the third. But keep on aiming and shooting for only practice will make you perfect. Finally you’ll hit ...