[JimC214]

You might like Poul Andersons “The Man Who Came Early”. The story is presented in the first person, related by a Saga-Age Icelander named Ospak Ulfsson. During a violent thunderstorm, an unexplained phenomenon transports the titular 20th-century American GI back in time to Ospak’s homestead. The American, who becomes known as Gerald “Samsson”, is an engineering student drafted to serve at Keflavik during the Cold War between the U.S. and the Soviet Union. It's from around 1956 and the story is sort of a reverse A Connecticut Yankee in King Arthur's Court.

[WoofDog123]

I thought I had read all of anderson’s saga/viking-era stories, but I haven’t seen this one. Buying now!