No, Dog fights were all most always only on the western front, Russia, Austria-Hungary, Serbia, Montenegro, Romania, Bulgaria, The Ottoman Empire, and Greece did not have large amounts of airplane's, the ones they did have were uses for recognisance
There were over 100 in WW1 and 57 in WW2
50 million from all 57 countries involved in the conflict
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.
World war 2 was a devastating time for all. Many countries, that wanted no part in the fighting and confusion unwillingly got sucked in the chaos. Countries such as the Phillipines.
Probably all of European countries.