Pepperm1nts said
Arguably, this is all part of the same war. One could say the war began the moment the Dutch invaded Belgium. I might be missing some bits here and there, but it seems to me it was at around that time that hostilities truly began. The annexation of Belgium is one of the key reasons for the war, or at least it seems so from my perspective.
That's our take on it. Also since Prussia withdrew from the Treaty of Constantinople they should probably give back the land they took from Denmark, but that's just my opinion.
Timeline:
Netherlands/Prussia annex Belgium.
ToC Signatories dislike. Should actually declare War because of ToC.
Ask Prussia/Belgium to give back land kindly. They refuse.
Rhetoric.
Ottomans send blockade because Prussia broke ToC.
Coaltion declares war.
Prussia withdrew illegally from the ToC(time limit on annulment) somewhere in there. I don't think Russia ever did. So Russia is breaking the ToC as well since they never withdrew.