"It was at its height in the mid-19th century and supported the idea of Scandinavia as a unified region or a single nation, based on the common linguistic, political and cultural heritage of the Scandinavian countries Denmark, Norway and Sweden." - Wikipedia

The Scandinavian trio's thoughts about this during the time it happened. Pairings are welcomed, but no smut please.

Bonus: Denmark and Norway reflect on their previous union.
Bonus 2: Tense relations between all three.