 On 10 May , Bravo Company , 3rd Battalion , <unk> Regiment , 101st Airborne Division , was ambushed by a much larger North Vietnamese force in the Se San Valley . Eight U.S. soldiers were killed and 28 wounded . Among the killed was <unk> . Leslie Sabo , Jr . ( posthumously promoted to sergeant ) , who was recommended for the Medal of Honor , but the <unk> went missing until 1999 . Sabo was awarded the Medal of Honor on 16 May 2012 by President Barack Obama . 
