Hollow square - when first used and who 'invented' it?

[Ignatieff]

Chaps

I know that in the SYW line was used to repel cavalry, but does anyone know when hollow square was first used, and by which army.  A drill book reference would be most useful as well.

thanks

Ignatieff

[dadlamassu]

The Romans certainly used it.

[Ignatieff]

Thanks. I know lots of pre gunpowder armies used it, but what about gunpowder armies?

S

[commissarmoody]

Pretty sure the Swiss cantons used them.