Multiple Sources Already Answered This Question

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  AFRICOM Deputy Commander for Military Operations

  Vice Admiral Charles J. Leidig explained in his transcribed interview with congressional staff that “in the AFRICOM Command Center, we were given access to every capability that was available and as quickly as it could move.”
  Source: Transcribed Interview with Congressional Staff, March 20, 2014
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  House Armed Services Committee Republican Staff Report

  The report described “a chain of events that involved DOD allocating various forces to the crisis.” Chairman Howard "Buck" McKeon stated after his review: “I think I've pretty well been satisfied that given where the troops were, how quickly the thing all happened and how quickly it dissipated, we probably couldn't have done more than we did.”
  Source: House Armed Services Committee, Feb. 10, 2014
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  Senate Select Committee on Intelligence Bipartisan Report

  “The Committee has reviewed the allegations that U.S. personnel, including in the IC or DoD, prevented the mounting of any military relief effort during the attacks, but the Committee has not found any of these allegations to be substantiated.”
  Source: Senate Select Committee on Intelligence, Jan. 15, 2014
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  The Independent Accountability Review Board

  “The interagency response was timely and appropriate, but there simply was not enough time given the speed of the attacks for armed U.S. military assets to have made a difference. … The Board found no evidence of any undue delays in decision making or denial of support from Washington or from the military combatant commanders.”
  Source: Accountability Review Board, Dec. 18, 2012
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  Accountability Review Board Vice Chairman Admiral Michael Mullen

  Former Chairman of the Joint Chiefs of Staff Admiral Michael Mullen explained during a transcribed interview that: “I concluded, after a detailed understanding of what had happened that night, that from outside Libya, that we’d done everything possible that we could.” He further explained that “it does not seem to be, at least from a public standpoint, widely understood, we moved a lot of forces that night. They don’t move instantly. But we had a significant force that was deployed doing other things, Special Operations Force in Europe, in Croatia, which was redeployed to a base in Southern Europe. We had a significant force from the United States which was deployed to a base in Southern Europe. So there were a lot of forces moving."
  Source: Transcribed Interview, June 19, 2013
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  Chairman of the Joint Chiefs of Staff General Martin Dempsey

  “The President instructed us to use all available assets to respond to the attacks to ensure the safety of U.S. personnel in Libya and to protect U.S. personnel and interests throughout the region. … Because threat streams increased in a number of locations simultaneously, we postured our forces to respond regionally as well as specifically to the events in Libya. In response to events in Benghazi, we deployed a Marine Fleet Antiterrorism Security team, or FAS, team as you probably know it. Prepared a second FAS platoon to deploy and moved the special operations force that was training in Croatia to a staging base in Italy. We also deployed a special operations force from the continental United States to an intermediate staging base in southern Europe.”
  Source: Briefing of the House Armed Services Subcommittee on Oversight and Investigations, Oct. 10, 2013
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  Former Secretary of Defense Robert Gates

  Former Secretary of Defense, Robert Gates, who served during both the Bush and Obama Administrations told the press: “Frankly, had I been in the job at the time, I think my decisions would have been just as theirs were.” He explained: “It’s sort of a cartoonish impression of military capabilities and military forces.”
  Source: Former Secretary of Defense Robert Gates, May 12, 2013