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Pre-WW2 German cursive
(lemmy.ml)
Technically these are all still Latin leters, just that they're written in a weird way that evolved from middle-aged Gothic handwriting as opposed to Latin directly which was the case with English cursive. This style of writing, along with the print-oriented 𝔣𝔯𝔞𝔨𝔱𝔲𝔯, was abandoned for the Latin equivalent by the Nazis for logistical reasons in 1941.
https://en.m.wikipedia.org/wiki/Kurrent https://en.m.wikipedia.org/wiki/Antiqua%E2%80%93Fraktur_dispute
It's called Sütterlin and had only been created in 1911 specifically for schools. The logistical reasons you mentioned were mostly related to the occupied territories where nobody could decipher German fonts. They wanted everyone to read their propaganda so they chose to adapt. A neat example of how little preserving traditions actually meant to them.
To be fair, i don't think I'd consider sütterlin to be traditional only roughly 20 years after its creation. To day it is of course, but back then?
You're not entirely wrong but Sütterlin was a subtype of German cursive which is much older and they abandoned the (also much older) Fraktur font as well.