Isolationism

Isolationism is a policy that the U.S. followed during the first years of World War One. Essentially, we ignored the war between France, Germany, (Great? Are you sure??) Britain, Russia, (See Communism, for a bit of well rounded entertainment...), Austria-Hungary, etcetera, etcetera...

Why
The policy is quite convenient, if you must know. If it doesn't affect us... or if we pretend that it doesn't affect us... then we escape a loss of young men and resources. Then, a problem arose...

Ze END of Ze World...
Basically, the U.S.A. has its large oil supplies sparked by the destruction of the Lusatania, a passenger ship bound for an area of war... or rather, an area of World War...

Because a U-boat sank this ship, a number of passengers died. Most of them were from foreign nations... The U.S. didn't mind them for a care, but the 114 americans who died of the sinking were declared martyrs for the cause of destroying Germany...

When the U.S. bans alcohol because a number of Christians grew rather loud, a number of cartoons are produced depicting Germans associated with the "Evil Alcohol; but not for priests... What goes on under the table, goes on under the table, fellas..." Germans and alcohol do seem to go hand in hand, as their drinking age is set to eighteen, and wine is a common beverage in small amounts for children, but...

They truly do not seem to be the "Devil"...