He was selected to attend the U.S. Naval Academy in the midst of World War II, and because of the ongoing war he and his classmates were placed in an accelerated three-year program. Upon graduating on June 6, 1947, he was commissioned a second lieutenant in the Marine Corps. He attended The Basic School at Quantico, Virginia, after which he became a platoon commander in the Platoon Leaders Class Training Regiment. In 1948, López went to China, where he served as a mortar section commander and later as a rifle platoon commander at Tsingtao and Shanghai. On his return from China he was assigned to Camp Pendleton, California. He was serving there when, shortly after the outbreak of the Korean War, he volunteered for duty as an infantry officer in Korea. He was promoted to the rank of first lieutenant on June 16, 1950.
Korean War – Medal of Honor action
In Korea, Lt. López served as a platoon commander in A Company, 1st Battalion, 5th Marines, 1st Marine Division. On September 15, 1950, he took part in the amphibious invasion of Inchon. After landing on the beach, he was captured in an iconic photograph by Marguerite Higgins as he led his men over a seawall. Moments later, while preparing to throw a hand grenade into a North Korean bunker, he was struck by automatic weapons fire in the chest and right shoulder, causing him to drop the activated device. Although seriously wounded, Lt. López crawled toward the grenade and unable to throw it because of his injuries, pulled it under his body to shield others from the blast. He was killed in the resulting explosion and was posthumously awarded the Medal of Honor. Secretary of the Navy Dan A. Kimball presented the medal to Lopez's parents during a ceremony in Washington, D.C., on August 30, 1951. News of his death spread quickly among fellow Marines on the battlefronts. A Scripps-Howard war correspondent, Jerry Thorp, said in a news story on López's deed that he "died with the courage that makes men great."
Medal of Honor
Lopez's official Medal of Honor citation reads: López was buried at the Centro Asturiano Memorial Park Cemetery in Tampa, Florida.
Several structures have been named in López's honor, including a state nursing home and a school in Seffner, Florida. A Korean War memorial at the Ed Radice Sports Complex in Tampa was opened on November 11, 2007, and dedicated to Lopez. The memorial features a rock from the beach at Incheon. A public swimming pool across from Macfarlane Park in West Tampa is named for him. The U.S. Navy's Military Sealift Command named a container ship after him, the. In Bancroft Hall, the U.S. Naval Academy dormitory, a room is dedicated to him, with a display including his photo and a bronze plaque of his Medal of Honor citation. There is also the Baldomero Lopez State Veteran' nursing home in Land O'Lakes FL at 6919 Parkway Blvd. López's Medal of Honor remains in the possession of his extended family.