Why is it called going 'commando'?

i don't understand why that term is associated with going without underwear.

And. I don't understand why I'm wondering. Being sick does strange things to me

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Guardian

"Urban Dictionary (s.v. Going Commando), a former infantry soldier and medic gives a plausible explanation. He writes that, when on the field, soldiers sweat a lot and can’t take showers for days. Their uniforms are loose enough to allow for ease of movement, and they don’t wear underpants in order to prevent skin eruptions and fungal infections."

Madmonk · M

@Guardian can confirm.