Question: For what military branch did the singer of So Far Gone serve?

full_context: Document 1: Heart to Heart (James Blunt song): "Heart to Heart" is a song performed by British singer-songwriter James Blunt, from his fourth studio album "Moon Landing" (2013). It was released on February 3, 2014 as a digital download. The song has peaked to number 42 on the UK Singles Chart, the song has also charted in Australia, Austria, Belgium, Germany, Italy and Switzerland. The song was written by James Blunt, Daniel Omelio and Daniel Parker.
Document 2: Say You Won't Let Go: ``Say You Wo n't Let Go ''is a song by British singer and songwriter James Arthur. The song was released as a digital download on 9 September 2016 in the United Kingdom by Columbia Records as the lead single from his second studio album Back from the Edge (2016). The single peaked at the top of the UK Singles Chart, a position it maintained for three weeks. Outside the United Kingdom, the single has topped the charts in Australia, New Zealand, Sweden and the Republic of Ireland. It also became his first hit in the US, peaking at number 11 on the Billboard Hot 100.
Document 3: So Far Gone (song): "So Far Gone" is the second single from English singer-songwriter James Blunt's third studio album, "Some Kind of Trouble". The single was released as a digital download single release exclusively in the United Kingdom on 3 January 2011. A live version of the song, recorded at Metropolis Studios, was included on the OpenDisc feature of "Some Kind of Trouble". Blunt performed the song live for the first time on "Comedy Rocks with Jason Manford" on 28 January 2011. Australian radio stations have picked up the song and are beginning to give it airplay as of March 2011.
Document 4: No Bravery: "No Bravery" is a pop rock song written by British singer James Blunt and Sacha Skarbek for Blunt's debut album "Back to Bedlam". The song was produced by Tom Rothrock and Jimmy Hogarth and received a positive reception from music critics. The song is written about Kosovo war while Blunt was serving there with NATO peacekeepers. It was released as the fifth single in April 2007, exclusively in France. The track peaked at No. 15 there. In the United States, "No Bravery" received heavy airplay but was not released as a single.
Document 5: Billy Joel: On December 1, 2007, Joel premiered his new song "Christmas in Fallujah". The song was performed by Cass Dillon, a new Long Island based musician, as Joel felt it should be sung by someone in a soldier's age range (though he himself has played the song occasionally in concert.) The track was dedicated to servicemen based in Iraq. Joel wrote it in September 2007 after reading numerous letters sent to him from American soldiers in Iraq. "Christmas in Fallujah" is only the second pop/rock song released by Joel since 1993's River of Dreams. Proceeds from the song benefited the Homes For Our Troops foundation.
Document 6: Some Kind of Trouble: Some Kind of Trouble is the third studio album by the British singer-songwriter James Blunt, released on 8 November 2010. On 6 December 2011, a deluxe version of the album was released, titled "Some Kind of Trouble: Revisited".
Document 7: I'll Be Your Man: "I'll Be Your Man" is a song by the British singer-songwriter James Blunt. It was released as the fourth single from his third studio album, "Some Kind of Trouble". The single was released as a digital download single on 23 May 2011, and as a physical single on 9 September 2011. The song also was released in the United States, where Blunt performed on the Conan O'Brien show and Dancing with the Stars. A music video was released on 26 May 2011, and featured footage of Blunt's "Some Kind of Trouble" tour.
Document 8: Chasing Time: The Bedlam Sessions: Chasing Time: The Bedlam Sessions is a live album and DVD released by James Blunt in 2006 as a follow-up to his 2004 debut album, "Back to Bedlam". The set contains a live album from Ireland, as well as a DVD featuring a recorded performance at the BBC, music videos for "High", "You're Beautiful", "Wisemen" and "Goodbye My Lover", and interviews taken from various television appearances and studio sessions. The audio CD was also included as part of a deluxe package of "Back to Bedlam" that was available in the United States, thus meaning that this release was not issued there.
Document 9: Stay the Night (James Blunt song): "Stay the Night" is the lead single from English singer-songwriter James Blunt's third studio album, "Some Kind of Trouble". The single was released on 25 October 2010. The single received an exclusive advance-release in Austria on 10 September 2010. The song has been a success on the ARIA Charts, scoring his first top ten hit in Australia since 2005's "Goodbye My Lover".
Document 10: Dangerous (James Blunt song): "Dangerous" is a song by the British singer-songwriter James Blunt. It was released as the fifth single from his third studio album, "Some Kind of Trouble" on 26 July 2011. The song was written by James Blunt and Steve Robson.
Document 11: James Blunt: Return to Kosovo: James Blunt: Return to Kosovo is a 2007 documentary film recorded in September 2006, when musician and former British Army Captain James Blunt returned to Kosovo to perform a concert for serving NATO troops, and to visit places and people he had encountered whilst serving in Kosovo in 1999. The documentary was directed by Steven Cantor.
Document 12: Back to Bedlam: Back to Bedlam is the debut studio album by the English singer-songwriter James Blunt, released on 11 October 2004 through Atlantic Records. It is named after the famous psychiatric institution of Bethlem Royal Hospital, which is commonly known as Bedlam.
Document 13: 65 Revisited: 65 Revisited is a 2007 American documentary film directed by D. A. Pennebaker. It was made from footage the director shot for his 1967 film "Dont Look Back". Both films show Bob Dylan and entourage during their 1965 concert tour of the UK. The newer film includes outtakes from its predecessor, and adds several full-length song performances.
Document 14: Jimmy Page: On 10 December 2007, the surviving members of Led Zeppelin, as well as John Bonham's son, Jason Bonham played a charity concert at the O2 Arena London. According to Guinness World Records 2009, Led Zeppelin set the world record for the "Highest Demand for Tickets for One Music Concert" as 20 million requests for the reunion show were rendered online. On 7 June 2008, Page and John Paul Jones appeared with the Foo Fighters to close the band's concert at Wembley Stadium, performing "Rock and Roll" and "Ramble On". For the 2008 Summer Olympics, Page, David Beckham and Leona Lewis represented Britain during the closing ceremonies on 24 August 2008. Beckham rode a double-decker bus into the stadium, and Page and Lewis performed "Whole Lotta Love".
Document 15: Love, Love, Love (James Blunt song): "Love, Love, Love" is the fourth single from James Blunt's second studio album, "All the Lost Souls". It is also his ninth single overall. It is the only song from the deluxe version of the album to be released as a single. It is also the first single released by Blunt to feature John Garrison, who replaced Malcolm Moore at the end of 2007, as one of the band members to perform on the track. The single was released on 7 November 2008, with a physical release appearing three days later. The song peaked at No. 121 on the UK Singles Chart, making it Blunt's lowest charting single to date.
ground_truth: British Army
sub_queries: So Far Gone >> performer Answer: James Blunt
James Blunt >> military branch Answer: British Army