Pretty much by the end of World War II, most people fighting for Germany in Berlin were part of the Hitler Youth and therefore under 18. Lots of stories came back from soldiers that saw teenage girls manning artillery cannons and 12 year old boys firing at Russian soldiers.
It’s really shocking when you realize that these people aren’t always grown men; in fact, lots of the time it’s quite the opposite.
“16 years old when I went to the war,
To fight for a land fit for heroes,
God on my side, and a gun in my hand,
Chasing my days down to zero,
And I marched and I fought and I bled and I died,
And I never did get any older,
But I knew at the time that a year in the line,
Is a long enough life for a soldier.”
– Motorhead – 1916 (Which is a surprisingly sad song!)