I have put some new rules onto an io group )a bit like the old Yahoo groups). They are for quick games using about 12 to 18 bases for historical armies. There is a set of core rules, plus supplements for various periods. The supplements include a playsheet, troop types and any rules specific to the period.
Currently there are completed Ancient & Medieval and Fantasy supplements. These are unlikely to need updating. There is a Pike and Shot supplement that is playable for the English Civil War, but needs more work for different geographical areas and for the previous century. There is a "Retro-Science Fiction" supplement which is nearly done, but may benefit from a little more play-testing. The American War of Independence supplement is very new and raw, but looks promising to me.
Basing isn't critical as long as all bases are the same width. Playing area depends upon base size, 40mm bases would want a 3' by 2' (90 cm by 60 cm) board whereas 60mm bases would want 4'6" by 3'.
The combat mechanism is slightly different from other games that I have seen. Each army starts with 28 break-points (BP). Unfavourable combat results mean that the army loses BP. You lose as soon as you lose more all the BP that you start with. Units can be destroyed, but that tends to happen a little less often than with many games. It is possible to lose more units than your opponent, and still win.
I chose to use io groups to distribute the rules because it seemed to give a good way for people to give feedback, and for me to answer questions.
If you are interested:
groups.io/g/WTFwargamerules
discovers a lost dinosaur.
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