For World War 1: the US, Britain and Commonwealth, France, Russia and Japan. For World War 2: the US, Britain and Commonwealth, France and the Soviet Union.
No, they will have a match of any sports in that who will win that country would be on 1 position.
About a third of the world's countries were involved in the war but the most important ones were Germany, Austria-Hungry, Ottoman Empire, U.S.A, France, Britain, Italy, and Russia. Japan and all of the British Commonwealth/Empire colonies also participated.
France is in Central European Time - CET (GMT+1)
There are 52 independent countries in Africa.
Britain and France
Although discussions about such an organization began in 1917, the British Commonwealth of Nations was not created until 1921, several years after WW1 ended.
France, Belgium & Russia
France and Germany were the last two countries in World War 1.
Britain, France and Russia
1. Australia 2. Canada
Primarily France and Belgium.