What were medics like in the Vietnam war?

During the Vietnam War, the US Marine Corps did not (and probably still do not) have medics. During Vietnam, ALL Marines were riflemen first, then tank crewmen, artillerymen, etc. "SECOND". Consequently, medical personnel from the US Navy were attached to fighting Marine elements, and were called "CORPSMAN." One of those men raising the US Flag atop Mt. Suribachi, on the island of IWO JIMA during WWII, in 1945, WAS NOT A MARINE! He was a US Navy "Corpsman." In Vietnam, US Army "Medics" were often nick-named "Doc" or "Band-Aid" and rode, walked, and lived with all US Army units in the field. Sometimes they carried an M-16 rifle, sometimes a .45 pistol. Sometimes, no weapon at all. Unlike WWII & Korea, US Army medics did not have red crosses painted on their helmets nor did they have red crosses on white cloth wrapped around their upper arms (arm bands), as frequently depicted in WWII movies. US Army medics were (and still are) trained at Fort Sam Houston, Texas, following boot camp. As a "general rule", medic's seemed to be more understanding and more pleasent to be around... at times; than your standard fighting GI...at times, during the Vietnam War.