England gets a hold of the gun. In the first two endings, he's simply threatening Canada. In the third, he betrays Cana-Bel-Land and threatens Canada.
He hesitates noticably, and looks Canada up and down. "But…he looks like..." he looks at America. Then he sighs, points the gun at Belarus and shoots her instead.
Everyone stares, then Russia starts cheering loudly. "I'M FREE!"
Japan says, "So…Belarus is the reason we were fighting..." Or something. Yeah.
The same as the other, except that when he turns and shoots Belarus, he says, "You know what? America was right. Forget communism." Bang. "God save the queen." >D