(Newb here, first thread)
So, for all of you who don't know, the Northern Seven Year's War was a war between Sweden and a coalition of Poland-Lithuania and Denmark-Norway. Anyway, this war ended in a sort of stalemate, but it gave Sweden the largest standing army in Northern Europe.
So, my question is, what if Sweden had summoned that army earlier in the war, and pushed back the joint forces? I'm not saying a direct attack on Krakow/Vilnius is possible, but Sweden at that point could have invaded Norway and parts of Poland-Lithuania. Then, if the character of Claude Colbart were to have actually convinced the ruler of Hessen to ally with Sweden, the joint Sweden-Hessen force could have attacked Copenhagen. If Copenhagen fell, Poland-Lithuania would probably step out of the war to avoid an attack.
The main problem of this is that Denmark had hired 25,000 professional soldiers to fight on it's behalf, and then those soldiers took out Älvsborg. If the Swedes would have sensed a war coming after diplomatic relations fell out, Sweden could have defended Älvsborg a bit more effectively, possibly being able to hold it. If they were, they could then sell as much salt as possible, and try to hire the soldiers themselves If not, the force could have invaded Trondheim with larger numbers, splitting Norway, and the Norwegian fighting force, in half. If then the Swedes treat the natives with respect, they could have moved up and down, killing Denmark's revenue.
If that were to happen, the Kalmar Union would be still desolved, but it would have been replaced by a larger Sweden. If this were all to have happened, then we would get to look forward to a larger amount of Swedish supremacy. Now, this may be going off on a limb, but a larger Sweden might have been able to fight of Peter the Great's force, and retain supremacy. Also, the Swedish colony on the Delaware River would be larger, and more retained. The British would then have to concentrate their colonists either in Canada or (less likely) towards the south, having to deal with more problems with the French/Spanish, respectively.
I probably ran into a storm of butterflies, but that's my thoughts. Yours?