The Four Eyed Dog is Dead is a set of free wargames rules for games set in the Taiping Rebellion.
For what it’s worth, the Taiping Rebellion is one of the least known — and at the same time, deadliest — conflict in world history. Taking place in China from 1950 to 1864, best estimates say that the Taiping Rebellion resulted in between twenty and forty million dead.
For some great eye candy, here is a video of what bills itself as the largest scale model railroad of Russia in the world. The layout features many of that country’s iconic buildings and sites.
Gott Mit Uns is a set of free wargames rules for the Thirty Years War. The author writes:
Gott Mit Uns (GMU) is a tabletop miniature wargames simulation of the Thirty Years War (1618-1648) that lets players refight the largest battles and seiges in a historic and enjoyable way, from White Mountain to Norlingen and beyond. GMU can be played with two players, one per side, but is more enjoyable and managable as team game, with one player per wing per side (1-4). The best miniature scale for the game is 10mm for visual impact, or 15mm. A 28mm game of GMU would require a very large space.