It was mainly fought in europe!
World War 1 was fought against primarily Germany.
It was mainly England.
Germany and Japan. Also Italy till September 1943.
Yes, Nigeria was in World War 1. They were part of Commonwealth during the time of World War 1, they mainly fought against the German colony of Cameroon.
France and Belgium
ThEy fought mainly because they wanted independance and wanted their own government and rule.
World War II was fought on a global scale. Mainly Europe, Asia/Pacific Islands and Africa.
France and Russia
World War I World War I was fought mainly in Europe from 1914-18 .
Us fought against Italy, Germany and Japan.
Germany