Bowie High School is one of the oldest operating high schools in El Paso. Originally located in the Segundo Barrio neighborhood of South El Paso, it came to primarily serve Mexican American students. The school was built in 1922 and named Bowie Grammar School in 1927, then became Bowie High School to relieve overcrowding at El Paso High School. Principal Robert C. Jackson oversaw 695 students during the first academic year, and by 1931 enrollment had reached 1,059. In 1939, a new building was constructed adjacent to the original 1922 building, creating the Bowie Junior and Senior High School campus, which spanned 25 acres and served more than 1,200 students. In 1949, Bowie High School won Texas's first Class 2A High School Baseball Championship. In September 1964, President Lyndon B. Johnson met Mexican President Adolfo López Mateos on the Bowie campus to sign the Chamizal Treaty, resolving a border dispute along the Rio Grande. The school was soon relocated to the west side of Cordova Island because of the newly resolved national boundary. It continued to grow, with 1,515 students attending in the 1973-74 school year, when a new campus was developed and trustees agreed to rename the existing school after Bowie alumnus Ambrosio Guillen, who received the Medal of Honor for his actions in the Korean War. In 1989, the 1922 building was razed and replaced by the new administrative and resource center for Guillen Middle School. Despite changes in name and location, the school's mission of educating and empowering students continued.