Shirts ruined warfare. Wars are meant to be fought with large numbers of shirtless men charging at each other, screaming profanities, and waving sharp lumps of metal over their heads. Instead you now get noabs faggots sneaking around in bushes with rifles and their queer as hell camouflage shirts.
>Or a single man in each squad that is trained and equipped with the PA-killer weapon.
>Making them obsolete.
Just like how armoured vehicles and aircraft were made obsolete by the introduction of man portable ATGM and SAM teams. Or how infantrymen were made obsolete by the introduction or rifles, right? :^)