This may be a language problem: Is 'Jet Fighter' a subdivision or an entire different thing?
WWII-'class' planes started to appear earlier, would it make sense to make the division in 1936? --Yooden
Furthermore, Jet fighters appeared at the end of WWII (Messerschmidt, Gloster Meteor) --
Arco Scheepen
There's even the rocket-powered fighters: Me 163, Bachem Natter, and even a Japanese version. The latter two never successfully flew even in testing, the first saw limited combat use. --
Belltower