Your knowledge of Maj D.R. Seuss's work reminded me of some of the other lesser-known poets of WW1. In grade 3 I had to memorize Joyce Kilmer's 1913 poem "Trees" , and recite it "with actions." It scarred me for life. Few people know, however, that Kilmer's kid brother Royce volunteered to fly in the RFC and did a little creative writing himself. Here is a sample oeuvre...
Fees by Royce Kilmer
I think that I shall never see A grid ungainly as a Fee.
A Fee whose frigid tub is thrust Into high Hunland’s wintry gust;
A Fee whose slightest jink or zoom Throws observers to their doom;
A Fee whose Beardsmore sits astride A painter’s ladder on its side;
With these devices must we try To frighten nasty Albatri.
What form of man could thus decree The R.A.F. to make a Fee?