I am new to these forums and am not sure this is the place to put this.
We often think of the German Army as serious and without a sense of humor. Alas, this was not the case!
In 1944, the General Director of Panzer Troops published a manual to train panzer troops in all facets of the Panther tank. The manual has cartoons - and is written in poem form! The only drawback is, as you can imagine, that the whole thing is written in German. (I am presently in the long, tedious process of translating it, but with my level of knowledge in the language, this will take some time. I'll let you know when (if) I finish it.
The manual can be downloaded in PDF form from www.archive.org. Here are the web addresses for two version:
https://archive.org/details/Panther-fibel-BetriebUndKampfanleitung
https://archive.org/details/Generalinspekteur-der-Panzertruppen-Panther-Fibel
Just thought I'd pass it one.
Nimrod