Where NATO amphibious operations against Russia would be plausible

Where might NATO conduct amphibious landings in a war with Russia?

Large invasions are unlikely; reinforcement landings in the Baltic and limited raids on the Russian Pacific coast are more plausible missions.

The Baltic already has several land fronts requiring troops, limiting the case for opening another through an opposed landing. Reinforcements might still have to cross beaches if usable ports were mined or destroyed. That is distinguished from an assault intended to establish a new campaign on Russian territory. Limited battalion- or brigade-sized raids along the Russian Pacific coast are suggested once Russian ground forces are committed elsewhere. The hypothetical raids would last a week or two, rather than attempting a sustained invasion.