11/19/1923
https://www.presidency.ucsb.edu...
"I do hereby declare and proclaim that I have found that there exist in Mexico such conditions of domestic violence which are or may be promoted by the use of arms or munitions of war procured from the..."
"I do hereby admonish all citizens of the United States and every person to abstain from every violation of the provisions of the Joint Resolution above set forth, hereby made applicable to Mexico, and..."
"It would be quite a different proposition in selling a large amount of material that our Government thought it was expected might be used for war purposes between one nation and another."
"I don't think it involves anything further than that."