For what action was Sgt John Basilone awarded the Medal of Honor?

Sgt John Basilone was awarded the Medal of Honor for his extraordinary heroism during the Battle of Guadalcanal in World War II. This battle was crucial as it marked the first major offensive by Allied forces against the Empire of Japan. During a fierce engagement on October 24-25, 1942, Basilone displayed exceptional bravery by single-handedly holding off a much larger Japanese force.

He operated a machine gun, which was critical in inflicting significant casualties on the enemy and preventing a breakthrough of Japanese troops. His actions not only highlighted his remarkable courage under fire but also his dedication to his fellow Marines, demonstrating outstanding leadership and tenacity in a pivotal moment of the battle. This act of valor is why he received the Medal of Honor, recognizing him as a hero who embodied the values of the Marine Corps.

The other options relate to military conflicts but do not pertain to Basilone's recognized acts of heroism and leadership, which are specifically linked to the events at Guadalcanal.