"You may recall it was the Russians that invaded."
How can they invade if their fleet is stationed there since forever.
"Do you have any limits to the extent you would permit Russia to seize additional territory? Western Ukraine? Poland? Finland? Malta? Scotland?"
Wrong example countries. The 2 countries were 'engaged' in sowjet times and while drunk, the 'groom' made a gift of the Crimea to the Ukraine, albeit his fleet was stationed there.
Since then the engagement was broken and the groom just wants his present back from the bride.