December 17, 1931
IT GIVES ME much pleasure on this Your Majesty's birthday to extend to you and the people of Yugoslavia cordial felicitations on behalf of my fellow countrymen and in my own name and to wish for Your Majesty a long and prosperous reign
HERBERT HOOVER
[His Majesty Alexander I, King of Yugoslavia, Belgrade, Yugoslavia]
Herbert Hoover, Message to King Alexander I of Yugoslavia Offering Birthday Greetings. Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/207091