They attended ceremonies in honor of JFK's new "Alliance for Progress" program. JFK cut a white & gold cord (a symbol for peace & prosperity).
Latin America pledged $80 billion while the US pledged $20 billion over a ten year period.
The program required Latin American participants to draw up comprehensive plans for national development.
In the short term, the Alliance proved successful but in part because JFK's successors did not give it as much support the program was less successful in the long term.
1944, the Battle of the Bulge began in Belgium.