After studying at the Naval War College in Newport, Rhode Island, Myers was sent on active duty at the outbreak of the Spanish–American War. He led a detachment which participated in the capture of Guam from its Spanish garrison, and sailed with the USS Charleston to the Philippines, then being attached to the USS Baltimore. During the Philippine–American War, he led several amphibious landings against Filipino rebels in 1899, gaining recognition for his heroic conduct. He was promoted to captain sometime in 1899. In May 1900, Myers was sent to China aboard the cruiser USS Newark and put ashore with a detachment of 48 Marines and 3 sailors to guard the US Legation in Peking, just as the Boxer Rebellion broke out. Myers' Marines occupied a wall defending the Legations, arguably the most vulnerable part of the defensive position, and led an attack as part of a ferocious battle on July 3 which dislodged the main Boxer position near the wall. Myers was wounded in the leg by a spear; his attack was claimed by the British Consul, Sir Claude Maxwell MacDonald, as "one of the most successful operations of the siege, as it rendered our position on the wall, which had been precarious, comparatively strong." As a result of his bravery in this action, he was brevetted Major and advanced four numbers in rank. In 1921, Myers would also become one of only 20 living Marines to be awarded the USMC Brevet Medal when that decoration was created. Upon recovering from his wounds, he served as the Provost Marshal on American Samoa and was then transferred to the Marine Barracks at Bremerton, Washington.
Later services
Myers led the detachment of Marines which accompanied the USS Brooklyn to Tangier, Morocco during the Perdicaris incident in 1904. After the incident was concluded, Myers held various other posts, both barracks commands and naval commands, including a time period commanding the Marine attachment of the Asiatic Fleet. He took part in expeditions to Santo Domingo and Cuba, and during World War I served as the counter-intelligence officer of the Atlantic Fleet. Myers was made Inspector General of the Department of the Pacific in 1921, serving in that post for three years, and from 1925 to 1928 commanded the 1st Marine Brigade, stationed in Haiti. He served various other posts, including, briefly, commander of the Department of the Pacific, before retiring a major general in 1934; after his retirement, in 1942, he was given the rank of lieutenant general. He relocated to Miami, Florida, after his retirement and died in Coconut Grove on April 17, 1952.
Fictional portrayals
While not actually portrayed on film, Myers has inspired characters in several films. In the historical epic 55 Days at Peking, Charlton Heston portrayed Marine Major Matt Lewis, commanding the American Legation Guard in Peking during the Boxer Rebellion. In The Wind and the Lion, the fictional Captain Jerome took on Myers' historical role, commanding the Marines dispatched to Tangier during the Perdicaris incident.