After being demilitarized in 2005, Sweden re-introduced permanent troops to Gotland in 2016, following Russia’s annexation of Ukraine’s Crimean Peninsula in 2014. Sweden also became NATO’s newest member in March — meaning it is covered by the alliance’s Article 5 guarantee that all other members come to each other’s defense if they are attacked.
Depends on how Sweden reacts to Russian troops on the island. If they react weakly, Russia would take advantage of it. Probably Russia isn’t that dumb to fuck around and find out though…