Commencing with World War I, Puerto Ricans and people of Puerto Rican descent have participated as members of the United States Armed Forces in every conflict in which the United States has been involved. Accordingly, thousands of Puerto Ricans served in the Armed Forces of the United States during the Vietnam War, also known as the Second Indochina War. Hundreds of them died, either killed in action (KIA) or while prisoners of war (POW). The Vietnam War started as a Cold War, and escalated into a military conflict that spread to Vietnam, Laos, and Cambodia from 1959 to April 30, 1975.

Félix Modesto Conde Falcón was a United States Army soldier and a recipient of the Medal of Honor. Born in Juncos, Puerto Rico, he joined the United States Army in April 1963 in Chicago, Illinois. He was killed during combat operations in Ap Tan Hoa, South Vietnam, on April 4, 1969. He was posthumously awarded the Medal of Honor by President Barack Obama in a March 18, 2014 ceremony in the White House. The award comes through the Defense Authorization Act which called for a review of Jewish American and Hispanic American veterans from World War II, the Korean War and the Vietnam War to ensure that no prejudice was shown to those deserving the Medal of Honor.