Actually, there's no guys on there.
Everyone one of those people is a girl pretending to be a guy so she can be in the army.
It becomes a kind of running gag that takes refuge in sheer audacity.
One third of the top brass in the army are females in disguise.
I wouldn't be amazed if it turned out that half the whole army was. It's quite amazing that they keep from running into each other..
With an army like that, it's hardly surprising that they win wars.
“She'd become a governess. It was one of the few jobs a known lady could do. And she'd taken to it well. She'd sworn that if she did indeed ever find herself dancing on rooftops with chimney sweeps she'd beat herself to death with her own umbrella.”
― Hogfather