Large LRP systems like the Vale tend to put a lot of effort into back stories, creating entire worlds with cultures and styles for the players to build upon. Time also gets spent on creating maps so that each individual event can form part of a larger campaign, the success of the players at each weekend usually has some influence on who controls which sections of the map.
The Vale is slightly different to other games because there are only 2 nations and they fight each other, this means when it came to making their world map they wanted 2, one for each side. I had plans to vary them slightly but due to a cut failure and then a machine failure the only real difference is in assembly. They came out pretty well though.