In which location did John Basilone earn the Medal of Honor?

John Basilone earned the Medal of Honor during the Battle of Guadalcanal. This battle was pivotal in the Pacific Theater during World War II, where Basilone demonstrated extraordinary heroism and leadership during intense combat. His actions as a gun section leader of a machine gun unit during the defense of Henderson Field exemplified bravery and selflessness under fire. Not only did he effectively man his gun under heavy enemy attack, but he also displayed remarkable tenacity by resupplying ammunition and persevering in the face of overwhelming odds. His actions contributed significantly to the American defense and earned him the highest military honor for his extraordinary heroism.

The other options represent notable battles in which Marines fought bravely, but they do not pertain to Basilone's heroics leading to the Medal of Honor. Tarawa and Iwo Jima were significant engagements involving Marine Corps valor, and Okinawa marked another crucial operation, yet none are connected to Basilone's receipt of the Medal of Honor which was specifically awarded for his actions during the Guadalcanal campaign.