Why did Luxembourg join NATO in 1949?

Luxembourg joined the North Atlantic Treaty Organization (NATO) in 1949 as a founding member, a move that marked the country's formal abandonment of its policy of perpetual neutrality.1

Following its liberation at the end of World War II, Luxembourg sought to integrate into new international security and economic frameworks to ensure its stability. By participating in the Brussels Treaty of 1948, Luxembourg demonstrated its commitment to collective defense alongside other Western European nations, which helped encourage the United States to play a direct role in the security of the region. Joining NATO allowed Luxembourg to participate in a broader military alliance designed to create a counterweight to Soviet influence in Europe, thereby replacing its previous reliance on neutrality with a system of collective security.123