| AAAS | American Association for the Advancement of Science |
| ACAV | Armored cavalry assault vehicle |
| ACV | Air cushion vehicle |
| ARA | Aerial rocket artillery |
| ARVN | Army of the Republic of Vietnam |
| AVLB | Armored vehicle launched bridge |
| BIRMINGHAM | Operation conducted in April 1966 by the 1st Infantry Division in War Zone C near the Cambodian border in Tay Ninh Province |
| CAISSON VI | Fire base of 1st Infantry Division near Xa Cat |
| CEDAR FALLS | Joint clearing operation in January 1967 conducted by 1st and 25th Infantry Divisions, 173d Airborne Brigade, 11th Armored Cavalry, and ARVN units against VC Military Region IV headquarters in the Iron Triangle |
| CEV | Combat engineer vehicle |
| CIDG | Civilian Irregular Defense Group |
| CN | Type of tear gas |
| CORONADO X | Operation in which the Mobile Riverine Force responded to Viet Cong attacks on My Tho and Vinh Long, drove the enemy from those provincial capitals, then operated near Cai Lay on Highway 4, early in 1968 |
| CROOK | Fire support base in Tay Ninh Province established in April 1969 |
| CS | Riot control type of tear gas |
| DELAWARE | Operation conducted in spring of 1968 by U.S. and ARVN units into A Shau Valley to pre-empt enemy preparations for an attack on the Hue area |
| DSU-GSU | Direct support unit-general support unit |
| FLOYD | Fire support surveillance base constructed in 1970 |
| G-3 | Assistant chief of staff for operations and training at an army, corps (field force in Vietnam), or division head quarters |
| G-4 | Assistant chief of staff for supply and evacuation at an army, corps (field force in Vietnam), or division head quarters |
| G-5 | Assistant chief of staff for civil affairs at an army, corps (field force in Vietnam), or division 'headquarters |
| HUE CITY | Operation early in 1968 conducted by U.S. Marine Corps and ARVN elements to defend and drive the enemy from Hue city during the Tet offensive |
| HUONG THUY | Task force composed of U.S. and Vietnamese forces involved in Operation PHU VANG I |
| INGRAM | A task force consisting of the 2d Battalion, 12th Cavalry, reinforced with a battery of artillery. The task force was charged with the security of Pleiku and the support of ARVN operations at Plei Me during the early stages of the battle for Ia Drang in 1965. |
| IRVING | Operation conducted by the 22d ARVN Division, the Republic of Korea Capital Division, and the U.S. 1st Cavalry Division (Airmobile) against 610th NVA Division in Binh Dinh Province in October 1966 |
| J-2 | Assistant chief of staff for military intelligence, MACV |
| J-3 | Assistant chief of staff for military operations, MACV |
| JUNCTION CITY | Largest operation conducted in Vietnam at the time, involving twenty-two U.S. and four ARVN battalions in War Zone C (Tay Ninh Province) and bordering provinces, 22 February-14 May 1967 |
| LAM SON II | Combined pacification operation conducted in June 1966 by Headquarters, 1st Infantry Division Artillery, and Headquarters, 5th ARVN Division, in Tan Phuoc Khanh |
| LRP | Long-range patrol |
| MACV | Military Assistance Command, Vietnam |
| MANHATTAN | Clearing operation conducted in 1967 by the U.S. 1st and 25th Infantry Divisions, the 11th Armored Cavalry, and ARVN forces in the Long Nguyen base area just north of the Iron Triangle |
| MASHER-WHITE WING | Operation conducted early in 1966 by 1st Cavalry Division (Airmobile), ARVN, and South Korean forces in Binh Dinh Province |
| MEDCAP | Medical Civic Action Program |
| MONTANA MAULER | Operation in April 1966 in the central demilitarized zone involving elements of the 1st Brigade, 5th Infantry Division (Mechanized), as well as U.S. Marine Corps units |
| NCR | National Cash Register |
| NIAGARA FALLS | Operations conducted early in 1968 by U.S. air and artillery to counter the enemy buildup against Khe Sanh |
| NVA | North Vietnamese Army |
| PAUL BUNYAN | Massive jungle-clearing project conducted by specially trained Army engineer units in September 1966 |
| PERMACAP | Personnel Management and Accounting Card Processor |
| PHU VANC | Task force composed of U.S. and Vietnamese forces involved in Operation PHU VANG I |
| PHU VANG I | Operation conducted in September 1968 by U.S. forces and Vietnamese paramilitary forces in an area one kilometer east of Hue city that included parts of three districts |
| PSYOP | Psychological operations |
| RANCH HAND | Operation to conduct defoliation and anticrop activities |
| REMAGEN | U.S. -ARVN armored-mechanized task force with Marine Corps units sent in March 1969 by the XXIV U.S. Corps commander to the Khe Sanh plateau to open Route 9 to Khe Sanh, cut Route 926, and protect the west flank of a 3d Marine Division reinforced regiment, which was trying to prevent the enemy from moving across the lower end of the plateau toward the A Shau Valley |
| RPG | Rocket-propelled grenade |
| S-2 | Officer in charge of the military intelligence section of a brigade or smaller unit |
| S-3 | Officer in charge of the operations and training section of a brigade or smaller unit |
| S-5 | Officer in charge of the civil affairs section of a brigade or smaller unit |
| SHENANDOAH II | 1st Infantry Division operation in Binh Duong Province and extended to include Loc Ninh area of Binh Long Province after the enemy attacks on the district town, 27 September-19 November 1967 |
| THAYER I | Operation in September 1966 in which U.S., ARVN, and Korean units forced the 610th NVA Division into a natural pocket, thus setting the stage for Operation IRVING |
| UNIONTOWN III-BOXSPRINGS | Operation conducted in February-March 1968 around Bien Hoa and Xuan Loc, northeast of Saigon |
| USARV | U.S. Army, Vietnam |
| USNS | United States Navy ship (civilian manned) |
| VC | Viet Cong |
| VINH | Loc Operation conducted in September 1968 by U.S. forces and Vietnamese paramilitary forces to free Vinh Loc Island from enemy control |
| YELLOWSTONE | 25th Infantry Division operation in War Zone C (Tay Ninh Province), 8 December 1967-24 February 1968 |