Return To The River Don is a set of free wargames rules for 15mm miniatures battles set in the Russian Civil War.
15mm
Gladius and Pilum Ancients Rules
Gladius and Pilum is a set of free wargames rules for battles set in the 500BC to 500AD era. They’re designed for 15mm miniatures, with one figure equaling 50 men.
Modeling 15mm Villages
Small World Productions has a photo essay on making a nice looking 15mm village.
Making 15mm Barbed Wire
The League of Ordinary Gamers has a quick and easy idea for making some good looking 15mm barbed wire.
The Lights Are Going out WWI Rules
The Lights Are Going Out is a set of free wargames rules for WWI in 1914. The rules are designed for 15mm figures.