From the update:
The sensational USE ME wargames series by 15mm.co.uk is a complete Ultra Simple Engine for Miniature Engagements (clue's in the name) but today on Barking Irons you can find optional additional rules for use in your games...
You do not need to use them, you can pick and choose from them to fit your own games. USE ME is very much a base for you to build your own gaming universe upon.
Advanced Mechanic for Firing into Close Combat
Shallow and Deep Water with Aquatics on the Table
Trenches and Razor Wire in Play
Vehicles and Ramming in Play
Optional Rule for Firing at the Rear of Vehicles