Question: What military branch did the writer of the book Bravo Two Zero was based on serve in?

full_context: Document 1: Black Hawk Down (book): Black Hawk Down: A Story of Modern War is a 1999 book by journalist Mark Bowden. It documents efforts by the Unified Task Force to capture Somali faction leader Mohamed Farrah Aidid in 1993, and the resulting battle in Mogadishu between United States forces and Aidid's militia. One of the key events is the downing of two United States UH-60 Black Hawk helicopters, from which the book derives its title, and the attempt to rescue their crews. United States forces included Army Rangers, 160th Special Operations Aviation Regiment, 10th Mountain Division, Delta Force and Navy SEALs, with United Nations peacekeeping forces also involved.
Document 2: Douglas A. Zembiec: Major Douglas Alexander Zembiec (April 14, 1973 – May 11, 2007), the "Lion of Fallujah" and also referred to as the "Unapologetic Warrior" was an officer in the United States Marine Corps and member of the CIA's Special Activities Division's Ground Branch who was killed in action while serving in Operation Iraqi Freedom. He is best known for his actions during Operation Vigilant Resolve, which were detailed in the book "No True Glory: A Front-line Account of the Battle of Fallujah" by Bing West and for an article that ran in the "Wall Street Journal" following his death.
Document 3: Douglas M. Stone: Douglas M. Stone is a Major General, United States Marine Forces Reserve, Retired. He relinquished in 2008 the position of Deputy Commanding General, Detainee Operations, Multi-National Force-Iraq and Commander, Task Force 134, commanding all detention operations at Camp Cropper, Camp Bucca and Camp Ashraf. He was nominated for Lieutenant General and was to be head of Marine Forces Reserve and Marine Forces North.
Document 4: Soldier Five: Soldier Five – The Real Truth About the Bravo Two Zero Mission is the third book about the Bravo Two Zero mission during the Gulf War to have been written by a member of the eight-man patrol involved.
Document 5: War on Terror: On 14 September 2009, U.S. Special Forces killed two men and wounded and captured two others near the Somali village of Baarawe. Witnesses claim that helicopters used for the operation launched from French-flagged warships, but that could not be confirmed. A Somali-based al-Qaida affiliated group, the Al-Shabaab, has confirmed the death of "sheik commander" Saleh Ali Saleh Nabhan along with an unspecified number of militants. Nabhan, a Kenyan, was wanted in connection with the 2002 Mombasa attacks.
Document 6: James Dubro: After leaving the CBC to work as a freelancer, Dubro wrote five books on organized crime in Canada and its international connections. He has also researched, written, or produced documentaries on organized crime, Cuba, the KGB and the CIA that have appeared on CBC, PBS, A&E, Citytv and CTV. He co-authored the definition of "organized crime" for all editions of "The Canadian Encyclopedia".
Document 7: Bravo Two Zero (film): Bravo Two Zero is a 1999 two-hour television miniseries (broadcast in two parts between 3 and 4 January in the UK), based on the book of the same name by Andy McNab. The film covers real life events – from the perspective of Andy McNab, patrol commander of Bravo Two Zero, a British SAS patrol, tasked to find Iraqi Scud missile launchers during the Gulf War in 1991. The names of the patrol members killed were changed.
Document 8: 999: What's Your Emergency?: 999: What's Your Emergency? Series 1 titles Genre Reality television, Documentary Narrated by Hugo Speer (2012) Julian Barratt (2013) Hugo Speer (2016) Country of origin United Kingdom Original language (s) British English No. of series No. of episodes 18 (16 aired) Production Executive producer (s) Ed Coulthard (2012 - 2013) Simon Ford (2012 - 2013) Guy Davies (2013) Producer (s) Daniel Fromm (2012) Mark Jones (2012) Ally Roberts (2013) Location (s) Blackpool (2012) Various (2013) Cheshire (2016) Running time 60 minutes Production company (s) Blast! Release Original network Channel 4 Original release 10 September 2012 -- present External links 999: What's Your Emergency? www.channel4.com/programmes/999-whats-your-emergency
Document 9: Jack Reacher: Jack Reacher is a fictional character and the protagonist of a series of crime thriller novels by British author Lee Child. After leaving the US Army as a major in its military police at age 36, Reacher roams the United States taking odd jobs and investigating suspicious and frequently dangerous situations. , 23 novels have been published, the most recent being "Past Tense". The character has also appeared in short stories, and two of the novels have been adapted into successful films, starring Tom Cruise as Reacher.
Document 10: James Bond: The James Bond series focuses on a fictional British Secret Service agent created in 1953 by writer Ian Fleming, who featured him in twelve novels and two short-story collections. Since Fleming's death in 1964, eight other authors have written authorised Bond novels or novelizations: Kingsley Amis, Christopher Wood, John Gardner, Raymond Benson, Sebastian Faulks, Jeffery Deaver, William Boyd and Anthony Horowitz. The latest novel is "Forever and a Day" by Anthony Horowitz, published in May 2018. Additionally Charlie Higson wrote a series on a young James Bond, and Kate Westbrook wrote three novels based on the diaries of a recurring series character, Moneypenny.
Document 11: Kill or Capture: How a Special Operations Task Force Took Down a Notorious al Qaeda Terrorist: Kill or Capture: How a Special Operations Task Force Took Down a Notorious al Qaeda Terrorist is a book published by Macmillan Publishing in early 2011. The author, a former interrogator, criticizes the use of ""extended interrogation techniques"".
Document 12: Zero Minus Ten: Zero Minus Ten, published in 1997, is the first novel by Raymond Benson featuring Ian Fleming's James Bond following John Gardner's departure in 1996. Published in the United Kingdom by Hodder & Stoughton and in America by Putnam, the book is set in Hong Kong, China, Jamaica, England, and some parts of Western Australia.
Document 13: Richard Castle: The name Richard Castle is also used as a pseudonym under which a set of real books about the characters Derrick Storm and Nikki Heat, based on the books mentioned in the television series, are written. These books have achieved success, becoming "New York Times" bestsellers. Actor Nathan Fillion appears as the face of Richard Castle on the books and on the official website, and participates in book signings. The Castle book series was actually written/ ghost-written by screenwriter Tom Straw.
Document 14: Nick Stone (character): Nick Stone is the main fictional character in a series of books written by Andy McNab, who is an ex-member of British Army regiment the SAS. Andy McNab has written about Nick Stone in thirteen different books. Nick has undertaken many missions including kidnapping a powerful Russian Mafia lord and killing a money-laundering Algerian business man.
Document 15: The Good Soldiers: The Good Soldiers (2009) is a non-fiction book about the 2007 troop surge in Iraq written by David Finkel, chronicling the deployment of 2nd Battalion, 16th Infantry Regiment of the 4th Infantry Brigade Combat Team, 1st Infantry Division, nicknamed "Rangers", under the command of Lieutenant Colonel Ralph Kauzlarich. The story follows Kauzlarich as he experiences the reality of war, and loses soldiers for the first time.
ground_truth: British Army
sub_queries: Bravo Two Zero >> has part Answer: Andy McNab
Andy McNab >> military branch Answer: British Army