One reason the narrator was surprised by Wallace story is that the narrator

The narrator was surprised at Wallace's story because he had not expected Wallace to be such an effective story teller.

Wallace's story seemed so fantastic to the narrator.  Listening to Wallace tell his story made him to start getting convinced that the story was a true one.

Wallace was describing a more beautiful world and as he did so in his story, he talked like he had a conviction of such.  This surprised  the narrator. He was beginning to be persuaded.

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answer: military leaders, supporters of the confederacy and supporters of the union.

explanation:

alliteration is the repetition of the same or similar consonants. having that in mind, i would say that the correct answer is: so shows a snowy dove trooping with crows.