Master Sergeant Juan E. Negrón Martínez was a member of the United States Army who served in the 65th Infantry Regiment during the Korean War. He was awarded a Distinguished Service Cross for his actions during combat in the Chinese Spring Offensive at Kalma-Eri, North Korea, on April 28, 1951, which was posthumously upgraded to the Medal of Honor in 2014.

The 65th Infantry Regiment, nicknamed "The Borinqueneers" during the Korean War for the original Arawak Indian name for Puerto Rico (Borinquen), is a Puerto Rican regiment of the United States Army. The regiment's motto is Honor et Fidelitas, Latin for Honor and Fidelity. The Army Appropriation Bill created by an act of Congress on 2 March 1899 authorized the creation of the first body of native troops in Puerto Rico. On 30 June 1901, the "Porto Rico Provisional Regiment of Infantry" was organized. On 1 July 1908, Congress incorporated the regiment into the Regular Army as the Puerto Rico Regiment of Infantry, United States Army. On 14 May 1917, the regiment was activated and additional men were assigned, with the unit being sent to serve at Panama. On 4 June 1920, the regiment was renamed 65th Infantry. During World War II, the regiment saw action throughout Europe, especially France and Germany, participating in Naples-Foggia, Rome-Arno and Rhin. Several Purple Hearts were awarded posthumously to members of the 65th Regiment.