CH-47 Chinook helicopter lifts off from Nui Dat, circa 1968-1969. Underneath the Chinook is a M101A1 105mm Howitzer and ammunition pallet belonging to 161 Battery. The gun crew and their equipment would be inside the helicopter.
The Battery went on many of its operations this way. On some occasions the Chinook would not lift off, due to the heat/heavy load and the gun crew would be forced to disembark. In such cases, the gun crew would follow later in another helicopter.
Image courtesy Brian Edmonds