this sounded weird so i looked it up, and it seems to be a sort of mistranslation, iranian soldiers were given a booklet of pamphlets called "Keys to Paradise" along their dogtags https://en.wikipedia.org/wiki/Plastic_key_to_paradise
As a person brought up Catholic I can imagine how that would work
Iranian child soldier: hey Pete, I have a key, let me open the gate
Pete on the gate: sorry dude. That's a dud key. Only the successors to me get to issue real keys, and my reps on Earth discontinued indulgences since 1667.
Pete: also you chose the wrong religion. You weren't even baptised. Sorry to say you're off to purgatory for a few kiloyears (Iran uses metric, right?) to pay for your bad choices, murder, and not getting your dick cut or getting baptised
As a reformed Catholic I'm pretty sure the kids gets what everyone gets: nothing
War, war never changes, from sticks and spears, to arrows and bullets, the old and bitter send the young and dumb to kill each other for their interests.
But it led to arguably the COOLEST combat engineering ever - Iraq destroyed all the roads through a marsh and ELECTRIFIED THE MARSH when a column of soldiers came through.
Closest analogue to what's going on in Ukraine. Dictator launches big, bold invasion, gets stopped, pushback offensive that doesn't really go anywhere. Both sides get desperate and start doing crazy shit. Lots of people die for nothing. US defense contractors make bank.
At risk of being too credible the Ukraine side did keep Russia out of Kiev, and the US military industrial complex really needs the practice on the industrial side.
If US industry makes bank keeping Ukraine alive for one more week, then consider that they're also getting America into a better position for opposing the bad countries of the near future