Question: What was the name of the concept used by the empire for Game pie when building another line of defense at the north border?

full_context: Document 1: Rhine: By the 6th century, the Rhine was within the borders of Francia. In the 9th, it formed part of the border between Middle and Western Francia, but in the 10th century, it was fully within the Holy Roman Empire, flowing through Swabia, Franconia and Lower Lorraine. The mouths of the Rhine, in the county of Holland, fell to the Burgundian Netherlands in the 15th century; Holland remained contentious territory throughout the European wars of religion and the eventual collapse of the Holy Roman Empire, when the length of the Rhine fell to the First French Empire and its client states. The Alsace on the left banks of the Upper Rhine was sold to Burgundy by Archduke Sigismund of Austria in 1469 and eventually fell to France in the Thirty Years' War. The numerous historic castles in Rhineland-Palatinate attest to the importance of the river as a commercial route.
Document 2: Let them eat cake: ``Let them eat cake ''is the traditional translation of the French phrase`` Qu'ils mangent de la brioche'', supposedly spoken by ``a great princess ''upon learning that the peasants had no bread. Since brioche was a luxury bread enriched with butter and eggs, the quote would reflect the princess's disregard for the peasants, or her poor understanding of their situation.
Document 3: Game pie: Game pies were consumed by the wealthy in the days of the Roman Empire. Wilhelm Adolf Becker states that the emperor Augustus consumed pies that contained chicken, pheasants, pigeon, and duck.
Document 4: Roman Republic: The staple foods were generally consumed around 11 o'clock, and consisted of bread, lettuce, cheese, fruits, nuts, and cold meat left over from the dinner the night before.[citation needed] The Roman poet Horace mentions another Roman favorite, the olive, in reference to his own diet, which he describes as very simple: "As for me, olives, endives, and smooth mallows provide sustenance." The family ate together, sitting on stools around a table. Fingers were used to eat solid foods and spoons were used for soups.[citation needed]
Document 5: Fried pie: Fast food versions have gained popularity more recently. McDonald's apple pies were introduced on the menu in 1968, but in 1992 they were phased out in favor of a baked pie (claimed to be healthier) in the United States. There are some McDonald's restaurants throughout the US and world which still offer the fried pies, including all McDonald's restaurants in the United Kingdom, Japan, and Russia. Flavors include cherry and apple (US mainland), taro (Hawaii), and green bean or red bean (China). The Burger King chain also offers fried pies on its menu, in apple and ``wild berry ''flavors. Whataburger and Popeyes also offer fried pies.
Document 6: Switzerland: By 1200, the Swiss plateau comprised the dominions of the houses of Savoy, Zähringer, Habsburg, and Kyburg. Some regions (Uri, Schwyz, Unterwalden, later known as Waldstätten) were accorded the Imperial immediacy to grant the empire direct control over the mountain passes. With the extinction of its male line in 1263 the Kyburg dynasty fell in AD 1264; then the Habsburgs under King Rudolph I (Holy Roman Emperor in 1273) laid claim to the Kyburg lands and annexed them extending their territory to the eastern Swiss plateau.
Document 7: Qing dynasty: Cuisine aroused a cultural pride in the accumulated richness of a long and varied past. The gentleman gourmet, such as Yuan Mei, applied aesthetic standards to the art of cooking, eating, and appreciation of tea at a time when New World crops and products entered everyday life. The Suiyuan Shidan written by him, detailed the culinary esthetics and theory, along with a wide range of recipes from the ruling period of Qianlong during Qing Dynasty. The Manchu Han Imperial Feast originated at the court. Although this banquet was probably never common, it reflected an appreciation by Han Chinese for Manchu culinary customs. Nevertheless, culinary traditionalists such as Yuan Mei lambasted the opulent culinary rituals of the Manchu Han Imperial Feast, saying that it is cause in part by "...the vulgar habits of bad chefs" and that "Display this trite are useful only for welcoming new relations through one’s gates or when the boss comes to visit." (皆惡廚陋習。只可用之於新親上門，上司入境)
Document 8: Galicia (Spain): In the early 5th century, the deep crisis suffered by the Roman Empire allowed different tribes of Central Europe (Suebi, Vandals and Alani) to cross the Rhine and penetrate into the rule on 31 December 406. Its progress towards the Iberian Peninsula forced the Roman authorities to establish a treaty (foedus) by which the Suebi would settle peacefully and govern Galicia as imperial allies. So, from 409 Galicia was taken by the Suebi, forming the first medieval kingdom to be created in Europe, in 411, even before the fall of the Roman Empire, being also the first Germanic kingdom to mint coinage in Roman lands. During this period a Briton colony and bishopric (see Mailoc) was established in Northern Galicia (Britonia), probably as foederati and allies of the Suebi. In 585, the Visigothic King Leovigild invaded the Suebic kingdom of Galicia and defeated it, bringing it under Visigoth control.
Document 9: Utrecht: From the middle of the 3rd century Germanic tribes regularly invaded the Roman territories. Around 275 the Romans could no longer maintain the northern border and Utrecht was abandoned. Little is known about the next period 270–650. Utrecht is first spoken of again several centuries after the Romans left. Under the influence of the growing realms of the Franks, during Dagobert I's reign in the 7th century, a church was built within the walls of the Roman fortress. In ongoing border conflicts with the Frisians this first church was destroyed.
Document 10: Switzerland: 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.
Document 11: Pub: Quality dropped but variety increased with the introduction of microwave ovens and freezer food. "Pub grub" expanded to include British food items such as steak and ale pie, shepherd's pie, fish and chips, bangers and mash, Sunday roast, ploughman's lunch, and pasties. In addition, dishes such as burgers, chicken wings, lasagne and chilli con carne are often served. Some pubs offer elaborate hot and cold snacks free to customers at Sunday lunchtimes, to prevent them getting hungry and leaving for their lunch at home.
Document 12: Germans: Conflict between the Germanic tribes and the forces of Rome under Julius Caesar forced major Germanic tribes to retreat to the east bank of the Rhine. Roman emperor Augustus in 12 BC ordered the conquest of the Germans, but the catastrophic Roman defeat at the Battle of the Teutoburg Forest resulted in the Roman Empire abandoning its plans to completely conquer Germany. Germanic peoples in Roman territory were culturally Romanized, and although much of Germany remained free of direct Roman rule, Rome deeply influenced the development of German society, especially the adoption of Christianity by the Germans who obtained it from the Romans. In Roman-held territories with Germanic populations, the Germanic and Roman peoples intermarried, and Roman, Germanic, and Christian traditions intermingled. The adoption of Christianity would later become a major influence in the development of a common German identity.
Document 13: Buchen: BULLET::::- The Roman Upper Germanic-Rhaetian Limes, the greatest ground monument in Europe runs round the edge of the city area Walldürn through Buchen, in the direction of Osterburken. Until around the year 260 the Romans used the Limes as a protective wall keeping them safe from the Alamanni and from other Germanic tribes. They built it all the way from Rheinbrohl a distance of 500 km up to the Danube
Document 14: Meat and potato pie: Meat and potato pie is a popular variety of pie eaten in England. A meat and potato pie has a similar filling to a Cornish Pasty and differs from a meat pie in that its content is usually less than 50% meat. They can be typically eaten as take-aways but are a homemade staple in many homes. Often it is served with red cabbage.
Document 15: Alps: Celtic tribes settled in Switzerland between 1000 to 1500 BC. The Raetians lived in the eastern regions, while the west was occupied by the Helvetii and the Allobrogi settled in the Rhone valley and in Savoy. Among the many substances Celtic tribes mined was salt in areas such as Salzburg in Austria where evidence of the Hallstatt culture was found by a mine manager in the 19th century. By the 6th century BC the La Tène culture was well established in the region, and became known for high quality decorated weapons and jewelry. The Celts were the most widespread of the mountain tribes—they had warriors that were strong, tall and fair skinned skilled with iron weapons, which gave them an advantage in warfare.
ground_truth: the linear defence concept
sub_queries: Which was the country for Game pie? Answer: Roman Empire
What was the name of the concept used by Roman Empire when building another line of defense at the north border? Answer: the linear defence concept