The Republic of Türkiye gave up the ideal of establishing a national defense industry, which it had set as a target since the War of Independence, due to the failure of the investments made since 1923 for different reasons and the military aid that came after 1947. The emergence of the USSR threat pushed Türkiye to become an ally with the USA after the war, and in 1952, Türkiye came under the protection umbrella of NATO. In this period, the conditional weapons aid from the US, in particular, caused Türkiye to experience an illusion of security. After the decision to intervene in Cyprus in 1964, with the letter sent by US President Johnson, Türkiye became aware of its illusory state. One of the reasons for delaying the Cyprus intervention for 10 years was the notification to Türkiye that the use of US-origin weapons would not be tolerated to intervene in Cyprus. Türkiye understood that it was impossible to rely on foreign weapons to realize national interests in this period, and the national defense industry, which has continued its development until today, re-adopted its founding goals. [ABSTRACT FROM AUTHOR]