He is saying that England will endure WW2, even if they are losing in the moment. He is saying that if they do surrender now, England will eventually win.
Magazine article is a printed source
Huckleberry's role: He's the lead role and narrator of the story.
His personality: He's a free spirit, and takes notice in the world, but battles the rules of society and the voice in his mind.
That's all I can help with