This is basically toy soldier scale. So pretty big battlefields are required - sometimes the floor - a nostalgic experience that revels in the Playset. See Joe's Soldiers for some amazing dioramas. Check out Barzso for some of the best - the French and Indian war figures are excellent - see the Fort Ticonderoga model. Woodland indians are superb.
World war two is pretty popular where it is usually referred to as 1:32 scale. Obviously Airfix multipose figures are useful as are the Forces of Valor painted diecast armour(see pic). Forces of Valor have some rules to download.
Forum Skirmish Wargames looks useful.
Get your big figures at Steve Weston or Harfields