Not too long after I build my Shattered Worlds system, a friend wanted to integrate his ideas. Dave 'took over' one of the far continents and followed the post-apocalyptic model. He decided to use some chunks from the contemporary United States of 1979/80 and have some fun. I blame his time in college for the political shenanigans and oddities, but at the time it was pretty funny. Having the parliamentary democracy taken over by the Orken Peoples Liberation Front after a couple years of skirmishing was priceless. Watching our Dwarven players melt down when told they had to wear an identifying plaque with serial numbers (Dwarves became the persecuted people) if they wanted to visit Amar. It was a good political reality check for a number of the players, a couple of us might even have had to think about it a bit. Either way it made for some good theater and tension, something different from the usual high fantasy. Although when Mary Gentle's novel 'Grunts' came out in 1992 it was a great example of parallel development of an obvious idea.
There was an earlier continental map, but it's stuffed somewhere or lost. I'd done this sketch to do a more detailed map for Dave, never got back to it. Still, useful for ideas.
Amar's level of technology was fairly high to start with, and progressed as various sides found more hidden caches and lost centers. There were tanks and trolls and ancient weapons than could fail at just the wrong moment.
In a later version the scavengers started running a Mad Max-like rally race down to the sea then back North through the wastelands, finally returning to the capitol via the mountain passes or some of the tunnel complexes. Lots of rules bending and breaking, but a fun set of ideas.
After Dave quit using the setting I ran some solo adventures set about 150 years after the Glorious Revolution, when some of the politics had settled down. That would have been around 1995-2000. Amar's been idle since, simmering up something weird, no doubt.