Question: The 34th Annual Tony Awards were co-hosted by the actor who was a combat veteran in which war?

Context paragraphs:
68th Tony Awards: The 68th Annual Tony Awards were held June 8, 2014, to recognize achievement in Broadway productions during the 2013–14 season.  The ceremony was held at Radio City Music Hall in New York City, and was televised live on CBS.  Hugh Jackman was the host, his fourth time hosting.  The 15 musical Tony Awards went to seven different musicals, and six plays shared the 11 play Tony Awards.

60th Tony Awards: The 60th Annual Tony Awards were held at Radio City Music Hall on June 11, 2006.  The award ceremony was broadcast live on the CBS television network in the United States.  The 2006 Tony Awards did not feature a host, but instead over 60 stars presented awards at the ceremony.

7th Tony Awards: The 7th Annual Tony Awards, presented by the American Theatre Wing, took place at the Waldorf-Astoria Starlight Ballroom, on March 29, 1953.  The Antoinette Perry Awards for Excellence in Theatre, more commonly known as the Tony Awards, recognize achievement in Broadway theatre.  The event was broadcast on radio by the National Broadcasting Company.  The presenter was Faye Emerson.  Music was by Meyer Davis and his Orchestra.

70th Tony Awards: The 70th Annual Tony Awards were held on June 12, 2016, to recognize achievement in Broadway productions during the 2015–16 season.  The ceremony temporarily returned to the Beacon Theatre in New York City after three years at Radio City Music Hall and was broadcast live by CBS.  James Corden served as host.  The 70th Tony Awards won the Emmy Award for Outstanding Special Class Program.

34th Tony Awards: The 34th Annual Tony Awards was broadcast by CBS television on June 8, 1980, from the Mark Hellinger Theatre.  The hosts were Mary Tyler Moore and Jason Robards.  The theme was "understudies"; each of the hosts and presenters had been understudies and offered anecdotes of that beginning.

6th Tony Awards: The 6th Annual Tony Awards, presented by the American Theatre Wing, took place at the Waldorf-Astoria Grand Ballroom, on March 30, 1952.  It was broadcast on radio station WOR and the Mutual Network.  The Antoinette Perry Awards for Excellence in Theatre, more commonly known as the Tony Awards, recognize achievement in Broadway theatre.

Jason Robards: Jason Nelson Robards Jr. (July 26, 1922 – December 26, 2000) was an American stage, film, and television actor.  He was a winner of the Tony Award, two Academy Awards and an Emmy Award.  He was also a United States Navy combat veteran of World War II.

20th Tony Awards: The 20th Annual Tony Awards was broadcast on June 16, 1966, from the Rainbow Room at Rockefeller Center on Radio Station WCBS.  This was the first afternoon Tony Awards ceremony.  The Masters of Ceremonies were George Abbott and Ginger Rogers.  The ceremony was sponsored by the League of New York Theatres in conjunction with the American Theatre Wing, which had previously solely arranged the ceremony.

55th Tony Awards: The 55th Annual Tony Awards was held at Radio City Music Hall on June 3, 2001 and broadcast by CBS.  "The First Ten" awards ceremony was telecast on PBS television .  The event was co-hosted by Nathan Lane and Matthew Broderick. " The Producers" won a record breaking 12 awards.  Mel Brooks's win made him the eighth person to become an EGOT.

56th Tony Awards: The 56th Annual Tony Awards ceremony was held at Radio City Music Hall on June 2, 2002 and broadcast by CBS.  "The First Ten" awards ceremony was telecast on PBS television.  The event was co-hosted by Bernadette Peters and Gregory Hines.

Supporting paragraphs: 34th Tony Awards Jason Robards
Answer: World War II