DM_Apexwolf says:
Building the world from scratch is nice but like Drama said you could get some conflicting stories. I will post a few full worlds amd maybe vote on them or we could go back to building the world as we go.
That's the beauty of a West March style campaign, you don't design a world. You start with a frontier town in the middle of hostile wilderness, and you go out and explore and build the areas around that one town. A lot of people think West March campaigns are Hexcrawls because of this. They are very similar, but while the Hexcrawl has already listed ahead of time everything there is to explore around the settlement the players are in, in a West March campaign, the players are the ones building the surrounding areas. If you want a desert 5 miles south of town, and nobody else has mapped that area already, well guess what, there's a desert 5 miles south of town...