Question: The Lopsi Liburnian tribe inhabited the mountains along the eastern coast of the Adriatic before and during this Empire and had the largest City in the world between which years?

Context paragraphs:
Liburnia: Liburnia in ancient geography was the land of the Liburnians, a region along the northeastern Adriatic coast in Europe, in modern Croatia, whose borders shifted according to the extent of the Liburnian dominance at a given time between 11th and 1st century BC.  Domination of the Liburnian thalassocracy in the Adriatic Sea was confirmed by several Antique writers, but the archeologists have defined a region of their material culture more precisely in northern Dalmatia, Kvarner and eastern Istria.

Casqui: Casqui was a Native American tribe discovered in 1541 by the Hernando de Soto expedition.  This tribe inhabited fortified villages in eastern Arkansas.

Eastern Ghats: The Eastern Ghats or Kizhakku thodarchi malaigal or Pūrva Ghaṭ or toorpu kanumalu, also known as Mahendra Parvatam in the south, are a discontinuous range of mountains along India's eastern coast.  The Eastern Ghats run from the northern Odisha through Andhra Pradesh to Tamil Nadu in the south passing some parts of Karnataka.  They are eroded and cut through by the four major rivers of peninsular India, known as the Godavari, Mahanadi, Krishna, and Kaveri.

Huemul Island: Huemul Island (Spanish: "Isla Huemul" ) is an island in the Nahuel Huapi Lake, off the shore of San Carlos de Bariloche, a city in the province of Río Negro, Argentina, at .  It derives its name from the Mapuche chief Güemul, whose tribe inhabited the area.  Considered a historical and ecological touristic attraction, it has recently been conceded to the municipality of Bariloche after licitations with the government of Río Negro.

Roman Empire: The Roman Empire (Latin: "Imperium Rōmānum" ; ] Koine and Medieval Greek: Βασιλεία τῶν Ῥωμαίων, tr.  "Basileia tōn Rhōmaiōn" ) was the post-Roman Republic period of the ancient Roman civilization, characterized by government headed by emperors and large territorial holdings around the Mediterranean Sea in Europe, Africa and Asia.  The city of Rome was the largest city in the world  100 BC  AD 400 , with Constantinople (New Rome) becoming the largest around AD 500, and the Empire's populace grew to an estimated 50 to 90 million inhabitants (roughly 20% of the world's population at the time).  The 500-year-old republic which preceded it was severely destabilized in a series of civil wars and political conflict, during which Julius Caesar was appointed as perpetual dictator and then assassinated in 44 BC.  Civil wars and executions continued, culminating in the victory of Octavian, Caesar's adopted son, over Mark Antony and Cleopatra at the Battle of Actium in 31 BC and the annexation of Egypt.  Octavian's power was then unassailable and in 27 BC the Roman Senate formally granted him overarching power and the new title "Augustus", effectively marking the end of the Roman Republic.

Adriatic Question: In the aftermath of the First World War, the Adriatic Question or Adriatic Problem concerned the fate of the territories along the eastern coast of the Adriatic Sea that formerly belonged to the Austro-Hungarian Empire.  The roots of the dispute lay in the secret Treaty of London, signed during the war (26 April 1915), and in growing nationalism, especially Italian irredentism and Yugoslavism, which led ultimately to the creation of Yugoslavia.  The question was a major barrier to agreement at the Paris Peace Conference, but was partially resolved by the Treaty of Rapallo between Italy and Yugoslavia on 12 November 1920.

San Nicolas Island: San Nicolas Island is the most remote of California's Channel Islands, located 61 miles (98 km) from the nearest point on the mainland coast.  It is part of Ventura County.  The 14,562 acre (58.93 km or 22.753 sq mi) island is currently controlled by the United States Navy and is used as a weapons testing and training facility, served by Naval Outlying Field San Nicolas Island.  The uninhabited island is defined by the United States Census Bureau as Block Group 9, Census Tract 36.04 of Ventura County, California.  The Nicoleño Native American tribe inhabited the island until 1835.  As of the 2000 U.S. Census, the island has since remained officially uninhabited, though the census estimates that at least 200 military and civilian personnel live on the island at any given time.  The island has a small airport and several buildings, including telemetry reception antennas.

Adriatic Sea: The Adriatic Sea is a body of water separating the Italian Peninsula from the Balkan peninsula and the Apennine Mountains from the Dinaric Alps and adjacent ranges.  The Adriatic is the northernmost arm of the Mediterranean Sea, extending from the Strait of Otranto (where it connects to the Ionian Sea) to the northwest and the Po Valley.  The countries with coasts on the Adriatic are Albania, Bosnia and Herzegovina, Croatia, Italy, Montenegro and Slovenia.  The Adriatic contains over 1,300 islands, mostly located along its eastern, Croatian coast.  It is divided into three basins, the northern being the shallowest and the southern being the deepest, with a maximum depth of 1233 m .  The Otranto Sill, an underwater ridge, is located at the border between the Adriatic and Ionian Seas.  The prevailing currents flow counterclockwise from the Strait of Otranto, along the eastern coast and back to the strait along the western (Italian) coast.  Tidal movements in the Adriatic are slight, although larger amplitudes are known to occur occasionally.  The Adriatic's salinity is lower than the Mediterranean's because the Adriatic collects a third of the fresh water flowing into the Mediterranean, acting as a dilution basin.  The surface water temperatures generally range from 30 C in summer to 12 C in winter, significantly moderating the Adriatic Basin's climate.

Adriatic Highway: The Adriatic Highway (Croatian: "Jadranska magistrala" ) is a road that stretches along the eastern coast of the Adriatic Sea and is part of the European route E65.  The road passes principally through Croatia, with smaller stretches through Bosnia and Herzegovina and Montenegro.  It is an undivided two-lane road for almost its entire length, with the exception of a short stretch through Zadar and a 24 km dual-carriageway section from Plano (Trogir) to the southeast suburbs of Split.  The dual carriageway is planned to be extended further southeast to Omiš.  Completion of the Adriatic Ionian motorway is proposed in order to replace the Adriatic highway as a high-performance road transport route along the Adriatic coast.

Lopsi: Lopsi is the name of a Liburnian tribe inhabiting the mountains along the eastern coast of the Adriatic before and during the Roman Empire, specifically present-day Velebit.  The tribe was mentioned by Pliny the Elder in his Naturalis Historia, and it borrowed its name to one of the Roman cities on the coast, Lopsica (present day Sveti Juraj in Croatia).  The name has survived to present day as a place name, as well as the family surname Lopac.

Supporting paragraphs: Lopsi Roman Empire
Answer: 100 BC  AD 400