Russia's conflict with Ukraine, which began in 2014 and escalated into a full-scale invasion in 2022, is considered the most significant security threat to Europe since World War II. However, this is not the only concern for European security, as Russia is also waging a "gray-zone" or hybrid war against other parts of Europe beyond Ukraine. This campaign involves tactics that are not necessarily overtly aggressive, but still pose serious challenges to NATO and US interests.