https://www.wired.com/story/robert-mueller-vietnam/
The Untold Story of Robert Mueller's Time in Combat
>>>> IN THE NEXT few minutes, numerous men went down in Mueller’s unit. Maranto remembers being impressed that his relatively green lieutenant was able to stay calm while under attack. “He’d been in-country less than a month—most of us had been in-country six, eight months,” Maranto says. “He had remarkable composure, directing fire. It was sheer terror. They had RPGs, machine gun, mortars.”
Mueller realized quickly how much trouble the platoon was in. “That day was the second heaviest fire I received in Vietnam,” Harris says. “Lieutenant Mueller was directing traffic, positioning people and calling in air strikes. He was standing upright, moving. He probably saved our hide.”