This photo tutorial offers great instruction on modeling an Iroquois style Indian longhouse.
18th Century
Guilford Court House Order of Battle and Scenario
A Miniature History of the American Revolution has orders of battle for Guilford Court House, the famous battle in the Southern Campaign of the American Revolution.
American Revolution Flags
A Miniature History of the American Revolution blog has a set of printable flags for the Continentals.
Smuggler’s Britain
Here’s a website with lots of information on smuggling in Britain in the 18th Century. I think there’s lots of gaming potential here.
Outlaws and Highwaymen Site
Outlaws and Highwaymen is a terrific site loaded with information about English criminal history.a