According to https://www.archives.gov/research/military/vietnam-war/casualty-statistics.... it says "The Vietnam Conflict Extract Data File of the Defense Casualty Analysis System (DCAS) Extract Files contains records of 58,220 U.S. military fatal casualties of the Vietnam War. These records were transferred into the custody of the National Archives and Records Administration in 2008."
The evidence is related to my Claim because it talks about the huge amount of American casualties and we still lost and pulled out. So many people lost their lives in a pointless attempt we would later stop and pull out of.