Why did the travelers use a prairie schooner?

they were waterproof.
they could haul many pounds.
they were small and light.
they could carry many people.

They were small and light.

I'm 80% sure this is right

hope it helps

(I know this question is 2016 but other people need it so)

the treaty of brest-litovsk was a peace treaty signed on 3 march 1918 between the new bolshevik government of russia and the central powers (german empire, austria-hungary, bulgaria, and the ottoman empire), that ended russia's participation in world war i.