I like it. You clearly took some inspiration from modern German military history. I get some Bundeswehr-vibes due to the camouflage colours of the vehicles, but this kind of field cap worn by AFV crew is rather WWII-style. I also like that you incorporated the 3rd Lyran Guards (though I obviously prefer them not being purple...).
Very nice job! If anything I'd suggest using epaulettes if you want that 20th century German military look.