Robert C. Peniston commanded a battleship that provided gunfire support during which war ?
the Vietnam War
Title: Banana Wars
Passage: The Banana Wars were the occupations, police actions, and interventions on the part of the United States in Central America and the Caribbean between the end of the Spanish–American War in 1898 and the inception of the Good Neighbor Policy in 1934.  These military interventions were most often carried out by the United States Marine Corps, which developed a manual, "The Strategy and Tactics of Small Wars" (1921) based on its experiences.  On occasion, the Navy provided gunfire support and Army troops were also used.
Title: Robert C. Peniston
Passage: Robert C. Peniston (October 25, 1922 – August 2, 2014) was a career United States Navy officer who rose to the rank of captain and commanded the battleship USS "New Jersey".
Title: USS New Jersey (BB-62)
Passage: USS "New Jersey" (BB-62) ("Big J" or "Black Dragon") is an "Iowa"-class battleship , and was the second ship of the United States Navy to be named after the US state of New Jersey.  "New Jersey" earned more battle stars for combat actions than the other three completed "Iowa"-class battleships, and was the only US battleship providing gunfire support during the Vietnam War.
USS New Jersey (BB-62) Robert C. Peniston