The War of the Three Kingdoms (Rules and Sign Ups)

[True Federalist (진정한 연방 주의자)]

Also, can I say that the PLC wasn't involved in the TYW and wasn't a part of the HRE (Prussia wasn't either). The only modern day part of Poland that was in the HRE at the time is Silesia. Just needed to clear it up a bit.

The PLC did try to instigate some intrigues against Sweden, including an alliance with Denmark-Norway, but those never amounted to anything. However, because of reluctance to go to war in the Sejm, Władysław IV was never going to be able to start anything.  For this game, the PLC makes much more sense as an NPC that various players might be able to entice into providing troops, if they provide the funding.

[True Federalist (진정한 연방 주의자)]

Also, can I say that the PLC wasn't involved in the TYW and wasn't a part of the HRE (Prussia wasn't either). The only modern day part of Poland that was in the HRE at the time is Silesia. Just needed to clear it up a bit.

The PLC did try to instigate some intrigues against Sweden, including an alliance with Denmark-Norway, but those never amounted to anything. However, because of reluctance to go to war in the Sejm, Władysław IV was never going to be able to start anything.  For this game, the PLC makes much more sense as an NPC that various players might be able to entice into providing troops, if they provide the funding.

It would also make sense to be able to infiltrate the Sejm and be able to use the puppet sejm to turn the PLC into a puppet due to the Liberum Veto, IIRC.

Not really.  First off, the Sejm was already anti-war, so you don't need the Liberum Veto to get Poland to not do anything that would be relevant to the game, but second and more importantly, the first use of the Liberum Veto won't be for close to another decade, and that on just a procedural matter that set the precedent for its later use.

[True Federalist (진정한 연방 주의자)]

And just to be clear, I have no interest in playing.  I don't have the time to do it.