Answer the question at the end by quoting:

The Nitty Gritty Dirt Band, an American country rock band, has existed in various forms since its founding in Long Beach, California in 1966. The group's membership has had at least a dozen changes over the years, including a period from 1976 to 1981 when the band performed and recorded as the Dirt Band. Constant members since the early times are singer-guitarist Jeff Hanna and drummer Jimmie Fadden. Multi-instrumentalist John McEuen was with the band from 1966 to 1986 and returned during 2001 departing once again in November 2017.
The group was inactive for a 6-month period after Paint Your Wagon, then reformed with Jimmy Ibbotson replacing Chris Darrow. With William McEuen as producer and a renegotiated contract that gave the band more artistic freedom, the band recorded and released Uncle Charlie & His Dog Teddy, issued in 1970. Embracing a straight, traditional country and bluegrass sound, the album included the group's best-known singles; a cover version of Jerry Jeff Walker's "Mr. Bojangles", Michael Nesmith's "Some of Shelley's Blues", and four Kenny Loggins songs including "House at Pooh Corner", the first recordings of Loggins's songs. Their version of "Mr. Bojangles" became the group's first hit, peaking at #9 on Billboard's all genre Hot 100 chart, with an unusual 36 weeks on the charts. The next album, All The Good Times, released during early 1972, had a similar style. Nitty Gritty Dirt Band next sought to solidify its reputation as a country band when band member John McEuen asked Earl Scruggs if he would record with the group. Earl's "yes" was followed the next week when John asked Doc Watson the same question, receiving the same answer of 'yes'. This set in motion the further addition of other artists, and with the help of Earl and Louise Scruggs, they set to traveling to Nashville, Tennessee and recording what was to become a triple album, Will the Circle Be Unbroken with Nashville stalwarts Roy Acuff, Earl Scruggs, and Jimmy Martin, country pioneer Mother Maybelle Carter, folk-blues guitarist Doc Watson, Merle Travis, Norman Blake, and others. The title is from the song, "Will the Circle Be Unbroken (By and By)", as adapted by A. P. Carter, and reflects the album's theme of trying to tie together three generations of musicians: long-haired boys from California and older veterans of the middle American establishment. The track "I Saw the Light" with Acuff singing, was a success, and the album received two nominations for Grammy Award. Veteran fiddler Vassar Clements was introduced to a wider audience by the album and gave him a new career. The band also toured Japan twice soon after this period. After the next album Les Thompson left the group, making the band a foursome. Stars & Stripes Forever was a live album that mixed old successes such as "Buy for Me the Rain" and "Mr. Bojangles" with Circle collaborations (fiddler Vassar Clements was a guest performer) and long storytelling spoken-word monologues. A studio album, Dream, was also released. During July 1974, the band was among the headline acts at the Ozark Music Festival at the Missouri State Fairgrounds in Sedalia, Missouri. Some estimates put the crowd at 350,000 people, which would make this one of the largest music events in history. At another concert, the band opened for the rock band Aerosmith.

What happened to them in 1971?

Answer the question at the end by quoting:

Christopher Lynn Hedges was born in St. Johnsbury, Vermont, the son of Thelma Louise (nee Prince) and the Rev. Thomas Havard Hedges, a Presbyterian minister. He grew up in rural Schoharie County, New York, southwest of Albany. He graduated in 1975 from the Loomis Chaffee School, a private boarding school in Windsor, Connecticut. He founded an underground newspaper at the school that was banned by the administration and resulted in his being put on probation.
In 2003, University of Texas classics professor Thomas Palaima wrote an article for the Austin-American Statesman accusing Hedges of plagiarizing Ernest Hemingway in Hedge's 2002 book War Is a Force That Gives Us Meaning. Palaima said that Hedges had corrected a passage in his first edition of War Is a Force That Gives Us Meaning that was close to Hemingway, and he should have cited the paraphrase in all subsequent editions. Hedges' publisher at the time, PublicAffairs, said it did not believe the passage needed to be cited to Hemingway. The New Republic said that Palaima's allegation had resulted in the passage being reworded. But, after posting the article online, the magazine posted a correction box that read: "In the original version of this article, The New Republic indicated that PublicAffairs changed the text of War Is a Force That Gives Us Meaning only after having been alerted by Thomas [Palaima] to the presence of plagiarism. In fact, the wording had been changed months earlier, and an edition with the present language existed at the time of Palaima's e-mail to PublicAffairs. However, there was still no attribution to Hemingway in the new version, despite the obvious similarities in ideas and formulation". In June 2014, Christopher Ketcham accused Hedges of plagiarism in an article published in The New Republic. Ketcham claims that Hedges plagiarized many writers over his career, including Matt Katz, Naomi Klein, Neil Postman, Ernest Hemingway, along with Ketcham's wife: Petra Bartosiewicz. Hedges, his editors at Truthdig, and his publisher Nation Books denied the claims made by Ketcham. In a response first published by The Real News on June 16, 2014, Hedges noted that Ketcham based his allegations on an unpublished manuscript which the latter man admitted he had never seen and passages that were actually footnoted or sourced. Hedges accused Ketcham and The New Republic (TNR) of malicious intent and character assassination. On the following day (June 17), The New Republic republished Hedges' response along with Ketcham's (and TNR's) response to the counter-allegations made by Hedges. The Washington Free Beacon reported The New York Times spokesman saying that it "did not have reason to believe Hedges plagiarized in his work for the paper" and had no plans to investigate Hedges for plagiarism. The American Prospect and Salon declined to publish Ketcham's article, and The Nation Institute and Truthdig issued statements dismissing Ketcham's allegations.

What was the name of his book
War Is a Force That Gives Us Meaning.