On 11 May 1950, James E. Webb, Acting US Secretary of State, welcomes the proposal of French Foreign Minister Robert Schuman to create a coal and steel pool, initially through the pooling of the French and German coal and steel industries.

On 11 May 1950, James E. Webb, Acting US Secretary of State, sends a telegram to Dean Acheson, US Secretary of State who is visiting London, in which he outlines the positive aspects of the Schuman Plan.

On 12 May 1950, Dean Acheson, US Secretary of State, sends a telegram to James E. Webb, Acting US Secretary of State, in which he describes the origins of the declaration of 9 May and particularly emphasises the role of Jean Monnet in the development of the Schuman Plan.

In this memorandum, which precedes the official, favourable reaction of US President Harry S. Truman, the Schuman Plan is presented as an advantageous initiative for US international policy.

On 18 May 1950, US President, Harry S. Truman, officially recognises the Schuman Declaration. He gives American support to the French proposal.

On 31 May 1950, David Bruce, US Ambassador to Paris, sends a telegram to Dean Acheson, US Secretary of State, in which he describes the reservations of the British with regard to the Schuman Plan and outlines the arguments developed by the two schools of political thought in France concerning the United Kingdom’s participation in the future coal and steel pool.

On 4 June 1950, David Bruce, US Ambassador to Paris, sends a telegram to Dean Acheson, US Secretary of State, in which he expresses his regret at the United Kingdom's decision not to take part in the implementation of the Schuman Plan and emphasises the importance of congratulating France for its leadership in this matter. According to the US Ambassador to Paris, it is essential that the United States reaffirm its support for the plan to pool European coal and steel production.