Question: What war did the author of "The Road Back" fight in?
Context: Lilyana Ivanova Petrova (Bulgarian: Лиляна Иванова Петрова , born April 24, 1939 in Kubrat), known professionally as Lili Ivanova (Bulgarian: Лили Иванова ) is a Bulgarian singer.  In tribute to her contribution to the culture of the country, she is often referred to as the "Prima of Bulgarian popular music".  Her best known songs are "Панаири" ("Fairs"), "Щурче" ("A Cricket"), "Стари мой приятелю" ("My Good Old Friend"), "Ветрове" ("Winds"), "Без правила" ("No Rules"), "Детелини" ("Clovers"), "Осъдени души" ("Doomed Souls"), "Наше лято" ("Our Summer"), "За тебе бях" ("To You I Meant"), "Хризантеми" ("Chrysanthemums"), "Camino" (in Spanish), "Море на младостта" ("Sea of Youth") and her Russian hit "Забудь обратную дорогу" ("Forget the Road Back"). All Quiet on the Western Front (German: "Im Westen nichts Neues" , 'In the West Nothing New' ) is a novel by Erich Maria Remarque, a German veteran of World War I.  The book describes the German soldiers' extreme physical and mental stress during the war, and the detachment from civilian life felt by many of these soldiers upon returning home from the front. The Armstrong Lie is a 2013 American documentary film directed by Alex Gibney about the cyclist Lance Armstrong.  Originally titled "The Road Back", the film takes its name from ""Le Mensonge Armstrong"", the headline of the August 23, 2005 issue of the French newspaper "L'Équipe".  The film was screened out of competition at the 70th Venice International Film Festival and in the Special Presentation section at the 2013 Toronto International Film Festival. Arthur Williams (September 26, 1946 – July 11, 2010) was an American career criminal who achieved early notoriety as New York City's "Elevator Bandit", who perpetrated a string of armed robberies in apartment buildings across Manhattan, mostly to support a heroin addiction.  Given a three-year term in prison, Williams was released after two years.  During the 34 years from 1975 to 2009, Williams spent 33 of those years in prison, with the exception of a two-month period after his release from jail when he went on a drug-fueled crime spree in 1980 that was widely publicized in the media.  In 2010, he drove from his home in Alabama to New York City, where he conducted an armed robbery of a Manhattan boutique while using a cane and an oxygen tank and wielding a gun which he fired in the store.  On the road back to Alabama, Williams robbed a pair of roadside hotels and then went back on the highway, where a police chase in Maryland ended in his death when he was thrown out of his Cadillac, which he had been driving at 120 mph . Kickboxer 2 (also known as Kickboxer 2: The Road Back) is a 1991 American martial arts film directed by Albert Pyun and written by David S. Goyer.  It is the first sequel to the 1989 film "Kickboxer", and stars Sasha Mitchell in the role of David Sloane, the brother of "Kickboxer"' s lead character Kurt, portrayed by Jean-Claude Van Damme. The Road Back is a 1937 American drama war film directed by James Whale starring John King, Richard Cromwell and Slim Summerville.  The screenplay is by Charles Kenyon and R. C. Sherriff from the eponymous novel by Erich Maria Remarque.  Combining a strong anti-war message with prescient warnings about the dangers of the rising Nazi regime, it was intended to be a powerful and controversial picture, and Universal entrusted it to their finest director, James Whale. The Road Back Home is the second compilation album by the Swedish progressive rock band The Flower Kings. A Little House Traveler: Writings from Laura Ingalls Wilder’s Journeys Across America is a collection of early writings by Laura Ingalls Wilder, the author of the Little House series of children's novels.  It consists of three parts: "On the Way Home", a diary originally published in 1962; "West from Home", a collection of letters from Wilder to her husband Almanzo Wilder written in 1915 and published in 1974; and "The Road Back", a previously unpublished diary. Rock Bonham...And The Long Road Back is an album released in 2005 by Daniel MacMaster. The Road Back (German: "Der Weg zurück" ) is a novel by German author Erich Maria Remarque, commonly regarded as a sequel to his 1929 novel "All Quiet on the Western Front".  It was first serialized in the German newspaper "Vossische Zeitung" between December 1930 and January 1931, and published in book form in April 1931.
Answer: World War I