Who is credited with writing an anonymous article about the soviet expansion plans that was influential in the creation of the truman doctrine? churchill marshall kennan stalin

The answer is Kennan. This article that the question is talking about is X Article. This was writtten by George Kennan under the pseudonym of Mr X. This was piublished in the Foreign Affairs Magazine in 1947 of July. He advocated the anti communism and policy of containement in the Sovient Union.