What role did the Mountain Men play in westward expansion?

They were the Trail Blazers that traveled, and learned what was out there and all the natural resources. Eventually they were able to guide the other people out there, and show them all the things that were out there.

Towns and small farms are usually for land, lakes, rivers, and seas.they also produce other food, like crops.it's also where animals are, where we get our meat.large plantations normally have forests, where crops are grown for sale. (similar to farms)plantations have larger fields of crops.our wine, sugar canes, and fruits come from plantations.