Answer:the civil war was the war between the united states and itself. WW1 was the first major world war between the seven major powers.USA,UK. France, and Russia VS Germany,Austria/Hungary and the Ottoman empire. WW2 was the second major world war between USA,UK, France and Russia VS Germany,Japan and Italy.
All countries listed above for the wars are just Major powers. there are also many other countries served in the war. except Switzerland. Switzerland just relaxing.
