That was the case before the invasion and annexation of Crimea.
There was no “invasion” of Crimea. The Russians had an Status of Forces agreement with the former Ukraine which was never violated.
With no controlling legal authority in Kiev, the Crimean peninsula held a referendum on their future and chose to become part of Russia.
The entire NATO / EU / IMF construct needs to be revisited. The days of subsidizing European security & prosperity with American blood and treasure are over.