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After the last Allied troops have left the country, and following the provisions of the Austrian Independence Treaty, Austria declares that it will never join a military alliance.

Historical image related to After the last Allied troops have left the country, and following the provisions of the Austrian Independence Treaty, Austria declares that it will never join a military alliance. from October 26, 1955

Related Wikipedia articles

Austrian State Treaty

1955 multilateral treaty regarding the international status of Austria

The Austrian State Treaty or Austrian Independence Treaty established Austria as a sovereign state. It was signed on 15 May 1955 in Vienna, at the Schloss Belvedere among the Allied occupying powers and the Austrian government. The neighbouring Federal People's Republic of…
Source: Wikipedia (CC BY-SA)

Declaration of Neutrality

1955 Austrian law declaring the country's permanent neutrality

The Declaration of Neutrality was a declaration by the Austrian Parliament declaring the country permanently neutral. It was enacted on 26 October 1955 as a constitutional act of parliament, i.e., as part of the Constitution of Austria.
Source: Wikipedia (CC BY-SA)