was a search and destroy operation initiated on 8 November 1965 by the 173rd Airborne Brigade, in an area about 17.5 miles north of Bien Hoa. The 1st Battalion, Royal Australian Regiment, deployed south of the Dong Nai River while the 1st Battalion, 503rd Infantry, conducted a helicopter assault on an LZ northwest of the Dong Nai and Song Be Rivers. The objective was to drive out Viet Cong fighters who had taken position in several key hills. Little contact was made through 7 November, when B and C Companies settled into a night defensive position southeast of Hill 65, a triple-canopy jungled hill.
Operation results and aftermath
The result of the battle was heavy losses on both sides—48 Paratroopers dead, many more wounded, and 403 dead PLAF troops.
Operation Hump is memorialized in a song by Big and Rich named 8th of November (Introduction, by Kris Kristofferson):
"On November 8th 1965, the 173rd Airborne Brigade on "Operation Hump", war zone "D" in Vietnam, were ambushed by over 1200 VC. 48 American soldiers lost their lives that day. Severely wounded and risking his own life, Lawrence Joel, a medic, was the first living black man since the Spanish-American War to receive the United States Medal of Honor for saving so many lives in the midst of battle that day. Our friend, Niles Harris, retired 25 years United States Army, the guy who gave Big Kenny his top hat, was one of the wounded who lived. This song is his story. Caught in the action of kill or be killed, greater love hath no man than to lay down his life for his brother."