The following morning, Companies I and M 3/7 Marines were landed by helicopter north of Núi Đàng and moved west and east to secure the adjacent villages of Vinh Binh (1) and Truong Sanh (14°49′05″N 108°58′30″E / 14.818°N 108.975°E / 14.818; 108.975).

As artillery hit Hai Mon, helicopters from HMM-262 deployed the Marines, who were quickly able to overcome the defenses with supporting fire.

On searching Hai Mon, the Marines found a network of well-constructed tunnels and bunkers, and engineers used over 3600 lbs of explosives to destroy them.

[1]: 57 Operation Desoto continued throughout February with the Marines searching numerous villages, meeting minimal opposition but suffering steady attrition due to mines and sniper fire.

[1]: 57 On 16 February, 1st Battalion 4th Marines launched Operation Deckhouse VI at Sa Huỳnh 18 km southeast of Núi Đàng.

On 27 March, the VC fired 18 recoilless rifle rounds at the destroyer USS Ozbourn 1 km (0.62 mi) from the mouth of the Song Tra Cau causing no damage to the ship.

[1]: 62 On 5 April, a patrol from Company G 3/7 Marines triggered a mine near their night defensive position southeast of Nui Dau.