Both, as both armies were able to invade the "territory" of the other. The South was about 30 miles form Washington DC and also in Gettysburg PA, The North engaged the South through out the south.

Source(s):

6th grade history almost 60 years ago.

It is for history class, I and a few others were chosen to do this.

To ask a white boy to rap is not the best thing to do but maybe Jack Parow can do better but I will try my best and maybe the war will not be such a contest

So the yanks and the bears we battling not fairs
To see who can make the biggest bang
And the bigger the bang the more the power

Allies and all the race was on

The yanks dropped the bomb whilst the bears found uranium in the east and shocked the west

All of the west was shocked
But the money was there and the bears were in dis pear

The yanks could deliver the atom
And the bears could just build a bigger bomb a
1000 times more powerful but then the missile became the norm and the bears had won nowhere in the world were you save, because anywhere It could be done

Not waiting to long, the yanks had caught on and enough power to destroy all that we know

So the yanks and the bears went MAD
Mutually assured Destruction

But with not enough money salt came along limitations were set and some success were met

There's not enough space here to answer that but rest assured, since the first two amoebas crawled out of the slime, there have been battles. War is unfortunately a necessary evil.