Marine Lance Corporal Ernest Delgado at Khe Sahn, Vietnam, 1968. Note his blood type and Tour of Duty countdown calendar on his cover, with “California”across front. (photo by David Duncan Douglas) [754x943]

Generally no. Status symbols and the like aren’t going to be placed on helmets anymore for survival reasons. The ace of spades on the helmet thing originally noted the soldier belonged to the 101st Airborne back in WW2,which is considered an elite unit, in nam it was suspected they were carried to be placed on bodies to play on Vietnamese superstitions. In a combat zone unit identifying patches are usually in subdued colors to make them blend in more with the uniform and not disrupt the camo patterns. But also displaying unit insignias can also give enemies a lot of intel. Knowing a unit’s capability and locations and stuff, which isn’t good. Generally though, something like that would just make you a target. It’s the same reason why we don’t salute officers in the field etc. Enemy snipers look for symbols of status when they’re picking their targets. Really there’s a whole bunch of reasons why you don’t do stuff like that anymore, and the anti America / etc stuff for other obvious reasons.

Now it's Yu-Gi-Oh cards

For the guys there, it was the worst year of their life (if not the last), and now we browse Pinterest looking for inspo. Omg, the playing card, just like Full Metal Jacket!!

Weird to think about.

have you ever wrote on a non-flat surface? lol

It's quite good for ballpoint pen

Right on the helmet there.