The VK 72.01 main gun is listed as "desc/weapon/150mm_kwk138". There are around 39 infantry with "???" in their name. For example, "???single_officer2(ger)" and "???squad_recruit_con(ger). When you go to buy "???single_officer2(ger)" it shows the name properly at the bottom of the screen as "Supplies Officer [Luftwaffe], however "???squad_recruit_con(ger)" lists a "Feldwebel [Heer]" and 8 "desc/human/mp/ger/mid/recruit".