>>96037328 (OP)I Dm'd a game that had a war going on at the edge of a continent. It wasn't part of the adventure I had written up but I like to think about kingdom logistics, how rivers flow or mountains are made and all that autistic stuff.
It was mostly out of the way for the first 1/3rd of the campaign but I dropped rumors of the armies amassing forces, raising taxes, more soldiers on the road, fortresses being build. sending out younger and younger folk etc.
Eventually a quest got them close enough to the frontline and they got drafted on the spot but they didn't like the stakes of the war so once they helped a bit they opted out.
Kept the war going for a while but my group was clearly not interested in that kind of game but they did enjoy it as a backdrop. Makes the world feel alive and real if nothing else.