Answer:
It is likely that the question is referring to the "Truman Doctrine," which was a U.S. foreign policy that provided military and economic aid to Greece and Turkey in 1947. The policy was a response to Soviet aggression in the region, and aimed to contain Soviet expansion and promote democratic values.
The United Kingdom, as a close ally of the United States, had been supporting Greece and Turkey with economic and military aid prior to the announcement of the Truman Doctrine. However, in the aftermath of World War II, the UK was facing economic hardship and was unable to continue its support for these countries.
As a result, the UK informed the United States that it could no longer provide assistance to Greece and Turkey, and urged the U.S. to take the lead in supporting these countries. This prompted the U.S. to announce the Truman Doctrine, which provided significant economic and military aid to Greece and Turkey, and marked a major shift in U.S. foreign policy towards containing Soviet expansion.