III MAF proceeded to plan a series of combined operations with ARVN forces that occurred from 18 to 26 May. Under Operation Hickory 3rd Marine Regiment advanced to the Bến Hải River.
Under Operation Lam Son 54 the ARVN 1st Division advanced parallel to the 3rd Marines along Highway 1 while the amphibious Special Landing Force Alpha secured the coastline south of the Bến Hải River under Operation Beau Charger and Special Landing Force Bravo linked up with 3rd Marines under Operation Belt Tight.
Once at the Bến Hải River, the forces swept south on a broad front to Route 9.

From 19 to 27 May, when Lam Son 54 ended, the ARVN were in constant contact with the PAVN.
The ARVN suffered 22 killed and 122 wounded, while claiming the PAVN suffered 342 killed and 30 captured.

The amphibious element of Operation Beau Charger met no opposition while the heliborne assault dropped into a hot LZ.
Only one platoon was landed and it remained isolated until rescued several hours later.
Beau Charger continued until 26 May with minimal contact.
85 PAVN were claimed to have been killed.

In Operation Hickory, the 2nd Battalion, 26th Marines and 2nd Battalion, 9th Marines advanced north from Con Thien on the morning of 18 May to press any PAVN against a blocking force from the 3rd Battalion, 4th Marines 3/4th Marines landed by helicopters on the Bến Hải  River.
At 10:00, 2/26th Marines made contact with 2 PAVN Battalions in bunkers and trenches.
The 2/9the Marines joined 2/26th and fought a running battle until nightfall.
Five Marines were killed and 142 were wounded, while 31 PAVN were killed.
That night 75 radar-controlled airstrikes were called in on the bunker complex.
At 07:00 on 19 May after 2 hours of artillery preparation (in which short rounds killed 3 Marines), the 2/26the Marines proceeded to attack the bunker complex, overrunning it by 10:30 and claiming to have killed 34 PAVN.
At 13:30 2/9th Marines met heavy automatic weapons and mortar fire and an M48 tank moved up to silence the PAVN positions with canister fire.
2 M48s were later knocked out by RPG-2 fire and 2/9th Marines suffered 7 killed and 12 wounded.

On 20 May, 3rd Battalion, 9th Marines covering the left flank of the operation encountered a PAVN bunker complex and in fighting lasting into 21 May suffered 26 killed and 59 wounded for 36 PAVN dead.
The reserve Special Landing Force Bravo 2nd Battalion, 3rd Marines joined the operation on 20 May landing by helicopter northwest of Firebase Gio Linh.
They swept the area north to the DMZ meeting minimal resistance but discovering PAVN bunkers and supplies.

On 25 May, Company H, 2/26th Marines engaged a large PAVN Company at the base of Hill 117, 5 km west of Con Thien.
Company H joined by Company K, 3/4th Marines made repeated advances up the hill against the PAVN with heavy fighting lasting throughout the day and costing 14 Marines and corpsmen killed and 92 wounded, while claiming 41 PAVN were killed.
Marine air and artillery pounded the top of the hill throughout the night, and a new assault was planned for the morning of 26 May, but PAVN fire brought down a UH-1E, injuring the command element, and the assault was postponed until 27 May when Companies E and F, 2/26th Marines and 3/4th Marines secured the hilltop with no resistance.

For the remainder of Operation Hickory the Marines encountered only scattered resistance but discovered and destroyed numerous bunkers, ordnance and rice.
Operation Hickory concluded on 28 May; the Marines had suffered 142 KIA and 896 wounded with US claims of 362 PAVN killed.
Lam Son 54, Hickory, Belt Tight and Beau Charger also resulted in the removal of the entire civilian population from the area with the result that it was all now a free fire zone.
III MAF proceeded to plan a series of combined operations with ARVN forces that occurred from 18 to 26 May. Under Operation Hickory 3rd Marine Regiment advanced to the Bến Hải River. Under Operation Lam Son 54 the ARVN 1st Division advanced parallel to the 3rd Marines along Highway 1 while the amphibious Special Landing Force Alpha secured the coastline south of the Bến Hải River under Operation Beau Charger and Special Landing Force Bravo linked up with 3rd Marines under Operation Belt Tight. Once at the Bến Hải River, the forces swept south on a broad front to Route 9.
From 19 to 27 May, when Lam Son 54 ended, the ARVN were in constant contact with the PAVN. The ARVN suffered 22 killed and 122 wounded, while claiming the PAVN suffered 342 killed and 30 captured.
The amphibious element of Operation Beau Charger met no opposition while the heliborne assault dropped into a hot LZ. Only one platoon was landed and it remained isolated until rescued several hours later. Beau Charger continued until 26 May with minimal contact. 85 PAVN were claimed to have been killed.
In Operation Hickory, the 2nd Battalion, 26th Marines and 2nd Battalion, 9th Marines advanced north from Con Thien on the morning of 18 May to press any PAVN against a blocking force from the 3rd Battalion, 4th Marines 3/4th Marines landed by helicopters on the Bến Hải  River. At 10:00, 2/26th Marines made contact with 2 PAVN Battalions in bunkers and trenches. The 2/9the Marines joined 2/26th and fought a running battle until nightfall. Five Marines were killed and 142 were wounded, while 31 PAVN were killed. That night 75 radar-controlled airstrikes were called in on the bunker complex. At 07:00 on 19 May after 2 hours of artillery preparation (in which short rounds killed 3 Marines), the 2/26the Marines proceeded to attack the bunker complex, overrunning it by 10:30 and claiming to have killed 34 PAVN. At 13:30 2/9th Marines met heavy automatic weapons and mortar fire and an M48 tank moved up to silence the PAVN positions with canister fire. 2 M48s were later knocked out by RPG-2 fire and 2/9th Marines suffered 7 killed and 12 wounded.
On 20 May, 3rd Battalion, 9th Marines covering the left flank of the operation encountered a PAVN bunker complex and in fighting lasting into 21 May suffered 26 killed and 59 wounded for 36 PAVN dead. The reserve Special Landing Force Bravo 2nd Battalion, 3rd Marines joined the operation on 20 May landing by helicopter northwest of Firebase Gio Linh. They swept the area north to the DMZ meeting minimal resistance but discovering PAVN bunkers and supplies.
On 25 May, Company H, 2/26th Marines engaged a large PAVN Company at the base of Hill 117, 5 km west of Con Thien. Company H joined by Company K, 3/4th Marines made repeated advances up the hill against the PAVN with heavy fighting lasting throughout the day and costing 14 Marines and corpsmen killed and 92 wounded, while claiming 41 PAVN were killed. Marine air and artillery pounded the top of the hill throughout the night, and a new assault was planned for the morning of 26 May, but PAVN fire brought down a UH-1E, injuring the command element, and the assault was postponed until 27 May when Companies E and F, 2/26th Marines and 3/4th Marines secured the hilltop with no resistance.
For the remainder of Operation Hickory the Marines encountered only scattered resistance but discovered and destroyed numerous bunkers, ordnance and rice. Operation Hickory concluded on 28 May; the Marines had suffered 142 KIA and 896 wounded with US claims of 362 PAVN killed. Lam Son 54, Hickory, Belt Tight and Beau Charger also resulted in the removal of the entire civilian population from the area with the result that it was all now a free fire zone.
Con Thien