Final answer:
In 'All Quiet on the Western Front', Kantorek refers to his former pupils as 'my boys' in his letter.
Step-by-step explanation:
In the book 'All Quiet on the Western Front', Kantorek calls his former pupils 'my boys'.
This can be seen in the letter he writes to his former students, urging them to enlist in the army during World War I. He refers to them as 'my dear boys' and tries to persuade them based on their duty and honor as young men.
Through this term of endearment, Kantorek attempts to elicit a sense of loyalty and obligation from his former pupils.