“The USS Henrico, Union, and Vancouver, carrying the 9th Marine Expeditionary Brigade under Brig. Gen. Frederick J. Karch, take up stations 4,000 yards off Red Beach Two, north of Da Nang.
First ashore was the Battalion Landing Team 3/9, which arrived on the beach at 8:15 a.m. Wearing full battle gear and carrying M-14s, the Marines were met by sightseers, South Vietnamese officers, Vietnamese girls with leis, and four American soldiers with a large sign stating: “Welcome, Gallant Marines.” Gen. William Westmoreland, senior U.S. military commander in Saigon, was reportedly “appalled” at the spectacle because he had hoped that the Marines could land without any fanfare. Within two hours, Battalion Landing Team 1/3 began landing at Da Nang air base.
The 3,500 Marines were deployed to secure the U.S. airbase, freeing South Vietnamese troops up for combat.”
Source: https://www.history.com/this-day-in-history/u-s-marines-land-at-da-nang