The U.S. policy was to promote a United States of Europe, and to this end the committee was used to discreetly funnel CIA funds - by the mid 50's ACUE was receiving roughly $1,000,000 USD per year - to European pro-federalists supporting such organizations as the Council of Europe, the European Coal and Steel Community, and the proposed European Defence Community.

The end of an article appearing in The Daily Telegraph in September 2000 noted that: The State Department also played a role.
A memo from the European section, dated June 11, 1965, advises the vice-president of the European Economic Community, Robert Marjolin, to pursue MONETARY UNION (EURO) by stealth. It recommends suppressing debate until the point at which "adoption of such proposals would become virtually inescapable".

https://en.wikipedia.org/wiki/American_Committee_on_United_Europe

https://www.telegraph.co.uk/news/worldnews/europe/1356047/Euro-federalists-financed-by-US-spy-chiefs.html

https://www.telegraph.co.uk/business/2016/04/27/the-european-union-always-was-a-cia-project-as-brexiteers-discov/

https://www.quora.com/Was-the-European-Union-a-CIA-project