That is not the worlds largest Army.

And I would not call them an army either.

That implies tactics, precision, command and control(structure).

Hunters dont have any training as 'hunters' for War at all.

NONE.

What I mean, is that the sport of hunting, has no value in War.

Other than learning to by still and quiet.

If hunters though, have really been planning and training when they meet out on lonely ranches, and are really the Militia in Camouflage, then yes, one 'could' call them an army of sorts.

But they are not the largest.

The largest Army in the World belongs to China, far surpassing the entire population of the US by hundreds of Millions, their Army does.