John Joseph Duffy (born 16 March 1938) is a retired United States Army major who was awarded the Medal of Honor on 5 July 2022, for his actions during the Vietnam War.

[1] On 14 April 1972, during the North Vietnamese Easter Offensive, following a rocket and artillery barrage, the People's Army of Vietnam (PAVN) 320th Division attacked Firebase Charlie (14°34′34″N 107°46′41″E / 14.576°N 107.778°E / 14.576; 107.778) 10 km from Dak To.

[4] The text of Duffy's Medal of Honor citation reads: Maj. John J. Duffy distinguished himself by acts of gallantry and intrepidity above and beyond the call of duty, while assigned to the 5th Special Forces Group and serving as a senior advisor to the 11th Airborne Battalion, 2nd Brigade, Airborne Division, Army of the Republic of Vietnam in the Republic of Vietnam, on April 14–15, 1972.

In the morning hours, after a failed effort to establish a landing zone for resupply aircraft, he moved close to enemy anti-aircraft positions to call in airstrikes.

During the early morning hours of April 15, the enemy ambushed the battalion, inflicting additional casualties and scattering some of the able-bodied service members.