If you mean the northern states, they fought in the Civil War. Other than that one time, the US has always been united. Any wars which involved the north, involved the entire US. The US has, of course, fought in two world wars and many other wars.
Fight wars without the use of nuclear weapons; limited wars.
?? WW2 or World WAR 2 was a war.
There's only been two world wars in the history of man.
How many? You think there has been MORE than two world wars? And in both cases, the US was involved. Honestly, some people.
no
The United States has fought in World War One and World War Two, the only two world wars so far.
No. The US fought against Hitler. We were allies of the UK.
Many American pilots did this in both world wars because US did not have an Air Force involved in the beginning of those wars. In WW2 many American pilots joined the Canadian and British Air Forces as well.
balls
According to Wikipedia, 116,708.
Many, many records exist of Emberson from both wars in England, Canada and US. Some Embersons show up in the Civil War Prisoner of War records as well.