When the Ukrainian crisis began, some commentators in the West suggested that NATO would not in the end fight to defend the Baltic countries even though the latter are full members of NATO, by asking "who is prepared to die for Narva?" But now a senior US State Department has given a clear and unequivocal answer: Western countries are.
Russia's War Against Ukraine
The Interpreter: ‘Americans are prepared to die for Latvia,’ Nuland says

NATO Secretary General Jens Stoltenberg (4th from R) and Latvian Defence Minister Raimonds Vejonis (5th form R) pose with US, Norweigan and Latvian soldiers during his visit at Adazi Military training base in Latvia on Nov. 21.