BATTLE SIZES

USING 25mm/28mm  20thCENTURY, 21stCENTURY, and sci-fi infantry,
vehicles, buildings, and terrain, on a 10ft by 5 ft or12 ft by 6 ft,
tends to be practically limited to a company or re-enforced  company per
side. withor without on table mortars.

possibly with off table air, artillery, or ortillery support, or mortars.

in the past, with other sci-fi rules,  we have had  as many as 5 players
, approx 150 infantry and 3-5  AFVs on each side.
have not done this with SG II though.

instead of imposing artificial ground scales, we eventually decided EVERYTHING
ON THE TABLETOP was in range, with LOS (and LOF!) restricted by buildings,
terrain, vehicles, and friendly troops.

makes for a very thoughful game when folks discover that " hard cover" offers
protection and concealment, while "soft cover" offers only concealment!

LOL-also folks start to think about going through walls and  over
rooftops rather than down streets with their grunts!

also we started to use various numbers of D6 for movement distance, modified
by terrain and weather, with our games to account for previously unseen and
undetected movement problems due to terrain conditions, or troop reluctance
(moving around in combat is dangerous!) or inability (due to combat loads) to
MOVE as much as the players want them to move.

coming from a gaming culture where big games were the norm, most of
us think othing of playing an 8-10 hour game to a conclusion, or to
fight battle over a period of real days.

in DALLAS, WRG Ancients and other rules campaign games in 25mm (and
15mm, 1:1200 naval, or micro-armor)) were routinely fought ought on
tables 6ft wide and up to 60ft long for years.

the average player had multiple "armies" in 25mm consisting of  300 -
1000 figures and models.

this meant that there were always troops available for NEW GUYS and GALS to
push while theybought and painted their own up.

and the biggest clubs, organized and based out of the ARMADILLO or
MINIFIGSUSA / HERITAGE MODELS, boasted  memberships of several 100s
active gamers - historical gamers, mostly, but  with huge sci-fi,
fantasy, RPG gaming contingents.

and a large gaming club was based out of the community college in RICHARDSON
(DALLAS suburb), as well as ARLINGTON, with smaller ones in GARLAND and
MESQUITE.

and numerous smaller gaming groups that interacted with the bigger groups.

your games, with any rules or figure scale, are only limited by playing space
and gamer commitment and enjoyment.

The game TomB ran at GZG ECC had a platoon (for the OU this meant six teams
plus command squad) on each side (plus reinforcements at the end), enough
terrain that you could usually move from cover to cover, and took about 3
hours. However, the OUDF side wasn't interested in making a
real fight of it--just get to the objective, grab it and withdraw.  A
determined assault would take longer.

Bear in mind that a 48x72" table is 480x720 meters--not really that much
space. You could do a company attack on a platoon prepared defense, or
something about that size. You might also be able to scale up by using
6mm figs instead of 15's or 25's--they have a smaller footprint (and in
fact they're pretty close to matching ground scale).