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[[Austria]] is a [[Europe]]an country that never joined NATO.<ref>https://www.catholicculture.org/commentary/ukraine-2022-fatima-austrias-neutrality-prayer-and-fasting/</ref>  Under the Austrian State Treaty (May 15, 1955), the [[Soviet Union]] withdrew its troops under the promise that Austria would declare its neutrality and remain a buffer between [[Western Europe]] and [[Eastern Europe]].<ref>https://2001-2009.state.gov/r/pa/ho/time/lw/107185.htm</ref>  This was the only treaty signed by both the Soviet Union and [[United States]] in the entire decade following the 1947 Paris Peace Treaties.

[[Austria]] is a [[Europe]]an country that never joined NATO.<ref>https://www.catholicculture.org/commentary/ukraine-2022-fatima-austrias-neutrality-prayer-and-fasting/</ref>  Under the Austrian State Treaty (May 15, 1955), the [[Soviet Union]] withdrew its troops under the promise that Austria would declare its neutrality and remain a buffer between [[Western Europe]] and [[Eastern Europe]].<ref>https://2001-2009.state.gov/r/pa/ho/time/lw/107185.htm</ref>  This was the only treaty signed by both the Soviet Union and [[United States]] in the entire decade following the 1947 Paris Peace Treaties.

Nearly all of the remainder of [[Western Europe]] has joined NATO, with the additional exceptions (among large countries) of [[Switzerland]], [[Ireland]], [[Sweden]], and [[Finland]].

Nearly all of the remainder of [[Western Europe]] has joined NATO, with the additional exceptions (among large countries) of [[Switzerland]], [[Ireland]], [[Sweden]], and [[Finland]], though, following the Russian Federation's invasion of Ukraine, the latter two are reconsidering.

[[File:Nato spending 2021.jpg|right|300px|thumb|NATO spending in 2018.]]

[[File:Nato spending 2021.jpg|right|300px|thumb|NATO spending in 2018.]],

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