Alternate history - What if? United Scandinavians

[Randarkmaan]

1. Is it actually possible for the Kalmar Union to continue to exist as an entity? Perhaps if Olav (son of Queen Margaret) didn't die at young age, he could actually do something? Or was it a union destined to doom since its inception?

Possibly, but the trouble would be that Danes and Swedes would undoubtedly continue arguing over who should be the dominant ones. Norway would not be so important was too weak as it's population was way too small (smaller than both Denmark and Sweden) and far too scattered, not to mention separated by mountains running down the country. If the Swedes and the Danes could somehow reconcile, the Union might be preserved.

2. Supposedly the Union continue to exist and managed to stop internal unrest. Will it actually become a strong entity? Will it able to resist and prevent annexation by its neighbours? How large do you think the military compared to other European kingdoms or states?

I think that they would not be strong enough on land, but strong enough to challenge complete Russian (and other foreign powers') domination of the sea with the combined fleets of Denmark-Norway (counted as one entity I'd say) and Sweden. I don't think the military would be that large, but I think Sweden had quite a competent military in the 17th century, if they came to dominate military matters and also had in their resources the manpower of Denmark and Norway (perhaps not from Norway, due to the long time it would take to recruit even a small army from there)

3. Will they attempt to expand their boundaries? Will there be race with other European kingdoms making colonies in the 'New World'?

Seeing as Denmark and Norway has always had relatively large merchant navies and good sailors, I don't see why not, especially since they could use their colonies on Iceland and Greenland as docking bases and such. Due to the nature of the winds and the location of those countries, I think, if they were successful in colonizing and able to keep up with competition from other European states, they would probable colonize Northern and Eastern parts of Canada. Would probably receive mostly Norwegian and Danish settlers.

4. How do other European states view this (big and strong entity?) Will continental European states (and perhaps England) at one time unite and attempt to destroy it? Or will this 'Scandinavian Union' smartly play the nations of Europe one against another, creating vassals, etc? What if major wars in Europe (Seven Years War, War of Spanish Succession, Thirty Years War) still occurred? Stay neutral? Who is the most likely allies and enemy?

I'll let someone else answer

5. Will it drastically change the political look of Europe at 20th century? A great power with many colonies worldwide? All of northern Europe under Scandinavian domination?

I'll let someone else answer

Are you Scandinavian by the way, Tran?