Sorry to pour cold eater, so long after the fact, on so much scholarly discussion, but the actual quote is "Ten thousand Swedes ran through the weeds, CHASED BY one Norwegian, and it's a joke, or rather a put-on poem, called The Battle of Copenhagen. I gather it did not originate in Scandinavia, but in the Great Lakes area of the United States, probably in Minnesota, where the Swede v. Norwegian rivalry is probably more active than in the Old Countries. There are about a dozen colloquial versions out there on the Net. There's also a much-expanded version published by Ernest Hemingway, but I think he stole it from the folk version.
"About the most originality that any writer can hope to achieve honestly is to steal with good judgment." --Josh Billings, c. 1865.