In the presence of the enemy during the action at Peking, China, 21 July to 17 August 1900. Throughout this period, Preston distinguished himself by meritorious conduct.
Research originally indicated that Herbert Preston's remains were not located after his drowning death. Subsequent research shows that his remains were indeed found several days later and intered at Norwalk Cemetery, Norwalk, CT. That plot remains lost to history. Before this new information came to light, he received an offical in-memory-of Medal of Honor headstone at his wife's gravesite in Riverside Cemetery, Norwalk, CT.