Papa's Assassins (Hetalia America + Canada Fanfiction)

When America and Canada were micro nations they were always raised together, they never seemed to be apart, and even called one another their "other half". But one day Big brother France and England decided to split them and so the conspiracy began.
"One will create a leader and the other shall win us a war"
What was the purpose of splitting them?
It didn't take long for America to learn the surface of the truth and he quickly rebelled, teaming up with his most trusted friend Japan, but as he went in search to tell his young brother Canada it was too late. America's long awaited reunion with his once called other half ended with a bullet in his chest by none other than Canada himself.
What will be the outcome of this battle between brothers? Will America's words be able to finally reach Canada or will he be shot down for good this time? America will have to choose between his brother or a full out World War.