paragraph_text: The North–South railway (, ) is the principal railway line serving the country of Vietnam. It is a single-track metre gauge line connecting the capital Hanoi in the north to Ho Chi Minh City in the south, for a total length of . Trains travelling this line are sometimes referred to as the Reunification Express (referring to the Reunification of Vietnam), although no particular train carries this name officially. The line was established during French colonial rule, and was completed over a period of nearly forty years, from 1899 to 1936. As of 2005, there were 278 stations on the Vietnamese railway network, of which 191 were located along the North–South line.

paragraph_text: GBU-10 bombs (along with the balance of the Paveway series) are produced by defense contractors Lockheed Martin and Raytheon.  Raytheon began production after purchasing the product line from Texas Instruments. Lockheed Martin was awarded a contract to compete with Raytheon when there was a break in production caused by transferring manufacturing out of Texas.

paragraph_text: Antelope Wells is a small unincorporated community in Hidalgo County, New Mexico, United States. The community is located along the Mexico – United States border, in the New Mexico Bootheel region, located across the border from the small settlement of El Berrendo, Chihuahua, Mexico. Despite its name, there are neither antelope nor wells in the area. The name comes from an old ranch, located north of the current community. The only inhabitants of the community are United States Customs and Border Protection employees.

paragraph_text: Danggogae Station is a station on Line 4 of the Seoul Metropolitan Subway network. It is the northern terminus of Line 4, and is an elevated station. The name of the subway station comes from its local name. Regional names refer to the pass that travelers carried over because of wild animals. When the Jinjeop Line opens in 2021, Line 4 will be extended to Jinjeop Gwangneung Forest Station.

paragraph_text: Immaculate Conception Catholic Church is a historic Catholic parish at Fulda in rural Noble County, Ohio, United States. Established in the 1840s among a group of German immigrants, it worships in a landmark building that dominates the surrounding community. The building has been named a historic site.

paragraph_text: Arsenal have often been stereotyped as a defensive and "boring" side, especially during the 1970s and 1980s; many comedians, such as Eric Morecambe, made jokes about this at the team's expense. The theme was repeated in the 1997 film The Full Monty, in a scene where the lead actors move in a line and raise their hands, deliberately mimicking the Arsenal defence's offside trap, in an attempt to co-ordinate their striptease routine. Another film reference to the club's defence comes in the film Plunkett & Macleane, in which two characters are named Dixon and Winterburn after Arsenal's long-serving full backs – the right-sided Lee Dixon and the left-sided Nigel Winterburn.

paragraph_text: Scud is the name of a series of tactical ballistic missiles developed by the Soviet Union during the Cold War. It was exported widely to both Second and Third World countries. The term comes from the NATO reporting name attached to the missile by Western intelligence agencies. The Russian names for the missile are the R-11 (the first version), and the R-17 (later R-300) Elbrus (later developments). The name Scud has been widely used to refer to these missiles and the wide variety of derivative variants developed in other countries based on the Soviet design.

paragraph_text: The names for the nation of Greece and the Greek people differ from the names used in other languages, locations and cultures. Although the Greeks call the country Hellas or Ellada (Greek: Ἑλλάς or Ελλάδα) and its official name is the Hellenic Republic, in English it is referred to as Greece, which comes from the Latin term Graecia as used by the Romans, which literally means 'the land of the Greeks', and derives from the Greek name Γραικός. However, the name Hellas is sometimes used in English as well.

paragraph_text: Batar was the name of a railway station on the North Coast railway line on the North Coast of New South Wales, Australia. The station, named for the nearby Batar Creek, existed at the site between 1941 and 1971.

paragraph_text: The Infiniti LE is a concept car developed by the Infiniti division of Nissan Motors and was revealed to the public at the 2012 New York Auto Show. The LE names comes from Luxury first and Electric second.

paragraph_text: Martin Ridge () is a broad ice-covered ridge bordering the west side of upper Moody Glacier in the Queen Alexandra Range, Antarctica. It was named by the Advisory Committee on Antarctic Names for Major Wilbur E. Martin, U.S.Army, who was in charge of trail operations during U.S. Navy Operation Deep Freeze, 1963.

paragraph_text: The Madikwe Game Reserve is a protected area in South Africa, part of the latest park developments in the country. Named after the Madikwe or Marico River, on whose basin it is located, it was opened in 1991 and comprises 750 km² of bushland north of the small town Groot-Marico up to the Botswana border.

paragraph_text: England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west. The Irish Sea lies northwest of England and the Celtic Sea lies to the southwest. England is separated from continental Europe by the North Sea to the east and the English Channel to the south. The country covers five - eighths of the island of Great Britain (which lies in the North Atlantic) in its centre and south, and includes over 100 smaller named islands such as the Isles of Scilly and the Isle of Wight.

paragraph_text: In about 260 AD, the fall of the Agri Decumates territory north of the Rhine transformed today's Switzerland into a frontier land of the Empire. Repeated raids by the Alamanni tribes provoked the ruin of the Roman towns and economy, forcing the population to find shelter near Roman fortresses, like the Castrum Rauracense near Augusta Raurica. The Empire built another line of defense at the north border (the so-called Donau-Iller-Rhine-Limes), but at the end of the fourth century the increased Germanic pressure forced the Romans to abandon the linear defence concept, and the Swiss plateau was finally open to the settlement of German tribes.

paragraph_text: Graham Land is the portion of the Antarctic Peninsula that lies north of a line joining Cape Jeremy and Cape Agassiz. This description of Graham Land is consistent with the 1964 agreement between the British Antarctic Place-names Committee and the US Advisory Committee on Antarctic Names, in which the name "Antarctic Peninsula" was approved for the major peninsula of Antarctica, and the names Graham Land and Palmer Land for the northern and southern portions, respectively. The line dividing them is roughly 69 degrees south.

paragraph_text: In the United States, self-defense is an affirmative defense that is used to justify the use of force by one person against another person under specific circumstances.

paragraph_text: Laubeuf Fjord is a sound in Antarctica, long in a north-south direction and averaging wide, lying between the east-central portion of Adelaide Island and the southern part of Arrowsmith Peninsula, Graham Land. It connects Hanusse Bay to the north with Marguerite Bay to the south. The southern 'border' between Laubeuf Fjord and Marguerite Bay is formed by the line between Rothera Point, Adelaide Island, and Cape Sáenz, which is the southernmost point of the Arrowsmith Peninsula. The fjord was discovered by the French Antarctic Expedition, 1908–10, under Jean-Baptiste Charcot, and named by him for Maxime Laubeuf, a French marine engineer who supervised building the engine for the ship "Pourquoi-Pas".

paragraph_text: Transocean Air Lines was an Oakland, California-based airline that operated from 1946 until 1960. The Transocean name was also used in 1989 by another US-based air carrier, TransOcean Airways, which previously operated as Gulf Air Transport.

paragraph_text: Martin Statue of Marte (Mars) Pronunciation English: / ˈmɑːrtɪn, - tən / Czech: (ˈmarcɪn) Finnish: (ˈmɑrtin) French: (maʁtɛ̃) German: (ˈmaɐ̯tiːn) Norwegian: (ˈmɑʈːɪn) Serbo - Croatian: (mǎrtin) Spanish: (maɾˈtin) Swedish: (ˈmaʈːɪn) Gender Male Origin Word / name Latin Meaning ``Of Mars, warlike, warrior ''Region of origin Roman Empire Other names Related names Martyn, Martti, Morten, Marten, Maarten, Marta, Mark (can also be used as a nickname), Martino, Martina

paragraph_text: ``Another Suitcase in Another Hall ''is a song recorded by Scottish singer Barbara Dickson, for the 1976 concept album, Evita, the basis of the musical of the same name. The musical was based on the life of Argentinian leader Eva Perón. Written by Tim Rice and Andrew Lloyd Webber, the song is presented during a sequence where Eva throws out her husband's mistress on the streets. The latter sings the track, wondering about her future and coming to the conclusion that she would be fine. Dickson was enlisted by the songwriters to record the track after hearing her previous work.

Question: What was the method used by the country that gave the world the name Martin when building additional defense lines at the north border?
Answer: the linear defence concept