The organization of american states (oas) was formed

The Organization of American States (OAS) was founded on April 30, 1948, in Bogota, Colombia, with 21 countries signing the original charter. A precursor dates back to 1890, when 18 countries met in Washington, DC, to form the International Union of American Republics.

The Organization of American States (OAS) was formed April 30, 1948, in Colombia. Hope this helped. (I hope this was what you were looking for)

The tet offensive was a series of simultaneous attacks organised by the vietcong in south vietnam