Here's all the rules you'll need to play the game.  Note that a lot of the equipment glossary is for the future version of the game.  We'll eventually Break it down for each era, but for now it's easier to just have one list.

Blitzkrieg Rule Set

Blitzkrieg Units

Basic Rule Set

Basic Units

Advanced Rule Set

Advanced Units

Phased Combat Rules

Example Combat

Equipment Glossary

Weapons Glossary

Prepping for Combat

Infantry
The Infantry Rules will be posted sometime after Little Wars 2003.

Biological / Chemical Warfare

Unit Construction