How does the author use foreshadowing in The Red Badge of Courage?

In Chapter Two, the rumored battle is not to take place but soon the regiment moves and the men are excited that something will happen soon, all except Henry. He has tried to work out his fear like a mathematical problem but he comes to the conclusion that it will take the fire and drama of an actual battle to test his mettle. He feels alone in his fear, too, as none of the other men talks about it or seems to be bothered by the potential carnage. He wonders if there might be something wrong with him because he is the only one who is concerned with the possibility of running. There is some foreshadowing when his comrade tells Henry that he knows he will do great things.