In country rest and recreation for troops was found at China Beach in Da Nang. From an article in the Tropic Lightning newspaper (14Sep1970):
At China Beach, a soldier can shuck the war for three days to surf, swim, sail and sleep. Nobody hassles anybody at China Beach. Nobody wears their rank on their swimming trunks or carries it into the weight room. The only problems a soldier will encounter are determining how much sun to soak up, how much food to take in and how much beer to wash down.
Hospital Corpsman Donald W. Vogt, Victoria, Texas, treats a Vietnamese woman while children watch, during patrol by Second Platoon, “L” Company, Third Battalion, First Marine Regiment eight miles southwest of Da Nang, Vietnam.
February 12 1969 LCpl Sanchez
Corpsmen and medics often treated the injuries and ailments of civilians. Sometimes units visited villages with the express purpose of rendering aid. A sidearm can be seen on Corpsman Vogt’s hip in this image.
SOUTH VIETNAM. Town of Da Nang. At the Airport. 1971. The Drug problem with American GI’s in Vietnam. Two American soldiers under the influence of drugs.
In 1971, the 16th year of the Vietnam War, two congressmen, Robert Steele from Connecticut and Morgan Murphy from Illinois, made a discovery that stunned the American public. While visiting the troops in Vietnam, the two congressmen discovered that over 15 percent of US soldiers had developed an addiction to heroin. (Later research, which tested every American soldier in Vietnam for heroin addiction, would reveal that 40 percent of servicemen had tried heroin and nearly 20 percent were addicted.) The discovery shocked the American public and led to a flurry of activity in Washington.