"The Medal of Honor is often given for one act of valor, but service members can also earn it for many acts over time. One of the more prominent names to have done that was World War II Marine Corps Gen. Alexander Vandegrift, whose command during the Guadalcanal campaign in the South Pacific led to a critical U.S. victory. Vandegrift was born March 13, 1887, in Charlottesville, Virginia. He went to the University of Virginia before being commissioned into the Marine Corps as a second lieutenant in 1909. Vandegrift didn't see combat during World War I, but he did serve overseas later in Cuba, Nicaragua, Mexico, Haiti and China. By 1942, when the U.S. had entered World War II, he had risen to the rank of major general. That summer, U.S. military leaders had learned that the Japanese were building an airfield on Guadalcanal, an obscure island in the Solomon Islands chain. It marked Japan's furthest advance toward the eastern half of the South Pacific, which was a great concern to the Allies. If Japan remained in control of the island, it could have imperiled vital U.S. supply lines to Australia and isolated that Allied nation. So, Guadalcanal became the focus of the first major U.S. offensive against the Japanese. For six months, Marines, sailors and soldiers took part in Operation Watchtower. Marines accounted for the largest part of the fighting force."