Anton Olmstead Myrer (November 3, 1922 – January 19, 1996) was a United States Marine Corps veteran and a best-selling author known for his American war novels. His works accurately and sensitively depict the lives of United States military personnel during both combat and peace time.

His 1968 novel, Once An Eagle, written at the peak of the Vietnam War, is required reading for all Marines and is frequently used in leadership training at West Point. The novel, considered a classic of military literature and a guide to honorable conduct in the profession of arms, has been compared favorably to Leo Tolstoy's magnum opus War and Peace. Eight years after publication, Once an Eagle was made into a television mini-series starring Sam Elliott, with Glenn Ford in a supporting role.

Myrer authored eight other novels, of which The Big War (1957) was adapted into a movie in 1958 and The Last Convertible (1978) was made into a television mini-series in 1979. Once An Eagle (1968) and The Last Convertible (1978) became international best-sellers and were translated into 19 languages.

The United States Army War College Foundation celebrates October 14 every year as Anton Myrer Army Leader Day to discuss strategic leadership issues. This day serves as the capstone event for the U.S. Army War College's strategic leadership course. The United States Army War College also presents an award called the Anton Myrer Strategic Leadership Writing Award annually on graduation day.

Anton Myrer, who died of leukemia in 1996, explored themes of America's loss of innocence and the use and abuse of power. The Last Convertible (1978) serves as a summation of the American experience during and after World War II. Once an Eagle traces the life of a regular Army officer and his family from before World War I to Vietnam. Orville Prescott, in The New York Times, praised Myrer as a "superb story teller....who cares about the narrative and is a master." The Army War College Foundation describes Once an Eagle as "a perceptive study of the profession of arms and a chilling overview of armed conflict."