Lyric discussion by AlbrtClvrt 

It makes most sense to me if the song is telling of a dream he had.

He is away fighting, is so tired and homesick, and has this dream where he is getting his wish to return home but then it turns into a nightmare which materializes his fear of dying before he gets to go back. The song ends the same way it started like maybe this is a recurring dream and/or fear.

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