Eh, just wanted to interject a bit of history here.
The
V2 was not an ICBM (a missile with intercontential range). The devolpment of the ICBM along with the reduction in size of the necular warhead was what started the cold war.
Rather, we entered we fully entered the second world war because if Hiler had taken Europe he would be in a nearly invincible position. With the west conqured he would be able to focus on the Russian front instead of fighting a two front war. Beyond this is just speculation, but with Europe under control and Russia either beaten or occupied Amercia would have been the last remaing enemy. Dwarfed by the combined might of the Germany, Italy, and Japan we wouldn't have stood a chance.
The official reason we were able to enter WWII was because of the attack on Pearl Harbor. The public outcry resulting from it's bombing put public support behind going to war and allowed the President to bring the US into WWII.
Sorry about the long winded essay, just wanted to clear up some misconceptions. I'm pretty sure all of the above is correct, if not let me know
.
~jrclark