Papermau offers a nice paper model of an ancient Roman Villa. It looks to be about 1/72 scale with with modern graphics software and printers, you can obviously scale it to any size you desire.
Here's a video tutorial on modeling trenches.
Path of the Outcast has a nice illustrated tutorial on mixing a base set of GW paints to come up with OTHER GW paints. For example: Chaos Black + Sunburst Yellow + Enchanted Blue = Scaly Green
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The Battle of Chaeronea, 338 BC is a set of free wargames rules for recreating Philip of Macedon's greatest victory. These are fast play rules from the Junior General series.