Meanings of boche bullet in English

Harry Leroy had been seen to go down, apparently with his machine out of control, after a fusillade of Boche bullets.

If the boche bullets and shrapnel happened to miss him, there were countless diseases-bredof trench and of hardship and of abominable food-tokill him.

"It's a miracle to me how a boche bullet can go through heads that are so full of first-quality ivory as those rubberers'."