Why do historians continue to gather historical evidence for even well-known events?

so that history will not be forgotten

Explanation:

if history is not well documented it will simply go unnoticed and undocumented

they died because of a disease during the first spanish colonies.

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.