Service Flashback: Joseph Mesa Comrade Joseph Mesa provided this photo collage of his Vietnam service. Joseph was a combat medic for the 173rd Airborne Brigade, 503rd Infantry Regiment, 2nd Battalion, from March 1966 to April 1967. He was involved in Operations Silver City, Yorktown, Cedar Falls and Junction City. For Operation Silver City, the 2nd Battalion was awarded a Presidential Citation. In Operation Junction city, the unit had its one combat jump while Joseph was assigned to it. Joseph noted, “I was thrust into combat operations just 9 months after graduating from High School. Still mentally dealing with the aftermath of my combat experience.”