none of the world wars were litterally a world war, not all of the countries fought on both wars and the countries didnt fight everyone on each other in both wars, WW2 was classified as a war world because it splitted most of it [Europe and USA joined it too] into 2 groups that fought each other: Allies and Axis.
No British counties fought against each other in ww1 England, Wales And Scotland All Fought Against The Germans/Austro-Hungarians In The First World War.
Spain and England .
The cold war was about how two countries fought each other.
Spain and the US.Spain and the US.
The UN fought North Korea, Red China. The US was part of the UN.
Spain and the US.Spain and the US.
they packed what they were told and fought each other
Germany and Italy
Austria-Hungary and Serbia
the blacks and whites fought against each other
In World War II, they didn't fight against each other, they were on the same side.