Question

who won the war of 1918?

Answer 1

Be more specific.

Answer 2

Was it World War One?

Answer 3

After a 1 minute research, I came into conclusion that you are either talking about World War 1, or the Finnish Civil War. But since World War 1 lasted for more than 1 year, I'm guessing you're talking about the Fiinish Civil War.
The Senate of Finland (Another name is White Finland) won the war against the Red Finland and the Russian SFSR. (Soviet Federative Socialist Republic)