Oh yeah swords we're totally still used at this time, but technology was advancing and Aldolphus (badass) was one of the first to switch things up successfully. Apparently some of his tactics developed in the Thirty Years War were borrowed in to the 19th century.

Yeah there's just different names for that union depending on the time period, Danish-Norwegian is modern, but there was always a "two kingdoms under one crown" view of it, "Twin Kingdom" was one of the names for it at the time.

There was a lot of modernization on the battlefield at this point as well with cannons and other siege artillery, arquebusiers, pike and shot formations. Swords were starting to take on a more symbolic role as they were associated with "honorable" combat, I mean they were technically "used" until WW1 by some units and certain positions still carry swords, although now almost entirely symbolically.

Dano-Norwegian Alliance "won" this dispute. Basically Sweden wanted to avoid paying Denmark's tolls for use of it's trade routes, they laid claim to a Norwegian territory and started collecting taxes there. Denmark-Norway actually teamed up with Sweden (Gustavo Adolphus) a few years later in the Thirty Years War, before returning to their rivalry shortly after.

If only this was seen as cool in the 90s lol