President of Vietnam and his brother assassinated 20 days before Kennedy part 1

Ngo Dinh Diem assassinated by US LBJ admits:
https://millercenter.org/the-presidency/educational-resources/lbj-and-eugene-mccarthy-on-the-assassination-of-dgo-dinh-diem

The retelling of this time in history by a contemporary blogger:
https://usledwar.blogspot.com/2020/08/7-secret-diplomatic-overture-to-hanoi.html

The main blog of this guy with a LOT of Vietnam history:
https://www.blogger.com/profile/16017405641706887735