On 2 November, South Vietnamese president Ngo Dinh Diem was assassinated. The United States had earlier withdrawn its support. The assassination drew America even further into the Vietnamese conflict.
Richert, Lucas Paul. "Assassination of South Vietnamese leader". The Literary Encyclopedia. First published 01 November 2008; last revised 30 November -1.
[http://www.litencyc.com/php/stopics.php?rec=true&UID=5661, accessed 28 April 2015.]