Four medium-size creatures. D&D says so, and it is the Law, right ?
Yes, I'll go with that rule MisterK.
Vladimir you're on top of the game with the lore on the East. Actually, the foes are of these lands as well , in a MERP game.
Tywyll the AD&D DMG rules!
Ecthelion, I found the Restricted Area fighting, RMSS Martial Arts Companion, in p. 87. A martial arts combatant needs an open area of space around his body with a radius approximately equal to his height to use his weapon without restriction.
Thanks for your answers!