Question: What is the name of the ancient people first described by a Roman historian in his treatise that is adjacent to Prussia?

Context paragraphs:
Lucretia: Lucretia ( ) or Lucrece (Latin: "Lucretia" ; died  510 BC ) was an ancient Roman woman whose fate played a vital role in the transition of Roman government from the Roman Kingdom to the Roman Republic.  While there were no contemporary sources, accounts from Roman historian Livy (Livius) and Greek-Roman historian Dionysius of Halicarnassus from the time of Emperor Caesar Augustus (23 September 63 BC – 19 August 14 AD) agreed that there was such a woman and that her suicide after being raped by an Etruscan king's son was the immediate cause of the anti-monarchist rebellion that overthrew the monarchy.

Aesti: The Aesti (also Aestii or Aests) were an ancient people first described by the Roman historian Tacitus in his treatise "Germania" (circa 98 CE).  According to Tacitus, Aestui, the land of the Aesti, was located somewhere east of the "Suiones" (Swedes) and west of the "Sitones" (possibly the Kvens), on the Suebian (Baltic) Sea.  This and other evidence suggests that "Aestui" was in or near the present-day Russian enclave of Kaliningrad Oblast (previously East Prussia).

Prussia (region): Prussia (Old Prussian: "Prūsa", German: "Preußen" , Lithuanian: "Prūsija" , Polish: "Prusy" ) is a historical region stretching from Gdańsk Bay to the end of Curonian Spit on the southeastern coast of the Baltic Sea, and extending inland as far as Masuria.  The territory and inhabitants were described by Tacitus in Germania in AD 98, where Suebi, Goths and other Germanic people lived on both sides of the Vistula River, adjacent to Aesti (further east).  About 800–900 years later the Aesti were named Old Prussians, who since AD 997 repeatedly successfully defended against take-over attempt by the newly created Duchy of the Polans.  The territory of the Old Prussians and neighboring Couronians and Livonians was unified politically in the 1230s as the Teutonic Order State.  Prussia was politically divided in the period 1466-1772, with western Prussia under protection of the crown of Poland-Lithuania and eastern Prussia a Polish fief until 1660.  The unity of both parts of Prussia remained preserved by retaining its borders, citizenship and authonomy until western and eastern Prussia were also politically re-united under the Kingdom of Prussia.  It is famous for many lakes, as well as forests and hills.  Since the military conquest by the Soviet Army in 1945 and the expulsion of the inhabitants it divided between northern Poland (most of the Warmian-Masurian Voivodeship), Russia's Kaliningrad exclave, and southwestern Lithuania (Klaipėda Region).  The former German state of Prussia (1701–1947) derived its name from the region.

Antonine Plague: The Antonine Plague of 165–180 AD, also known as the Plague of Galen (from the name of the Greek physician living in the Roman Empire who described it), was an ancient pandemic brought back to the Roman Empire by troops returning from campaigns in the Near East.  Scholars have suspected it to have been either smallpox or measles, but the true cause remains undetermined.  The epidemic may have claimed the life of a Roman emperor, Lucius Verus, who died in 169 and was the co-regent of Marcus Aurelius Antoninus, whose family name, Antoninus, has become associated with the epidemic.  The disease broke out again nine years later, according to the Roman historian Dio Cassius (155–235), causing up to 2,000 deaths a day in Rome, one quarter of those who were affected, giving the disease a mortality rate of about 25%.  The total deaths have been estimated at five million, and the disease killed as much as one-third of the population in some areas and devastated the Roman army.

British Library, Add. 17212: British Library, Add.  17212 is a double palimpsest, with three successive writings: a Syriac translation of St. Chrysostom's "Homilies" of the 9th/10th century covers a Latin grammatical treatise from the 6th century, written in cursive, which in turn covers the "Annales" of Roman historian Granius Licinianus.  It is a rare example of a double palimpsest.  The manuscript has survived in incomplete condition.

Bellum Batonianum: The Bellum Batonianum (Latin for "war of the Batos") was a military conflict fought in the Roman province of Illyricum in which an alliance of the native peoples of Illyricum rebelled against the Romans.  The name Batonianum holds some similarity to early Bosnian name Bestonensis and Illyrian state Bossona.  There were two regions in this Roman province: Dalmatia and Pannonia.  The rebellion began among native peoples who were recruited as auxiliary troops for the Romans.  They were led by Bato the Daesitiate (the Deasitiae were a tribe which lived in Dalmatia).  They were joined by the Breuci (a tribe in Pannonia) led by Bato the Breucan.  Many other tribes in Illyria also joined the revolt.  The Roman called this conflict bellum batonianum (Batonian war) after these two leaders who had the same name.  Velleius Paterculus called it the Pannonian and Dalmatian war because it involved both regions of Illyricum.  In English it has been called the "Great Illyrian revolt", "Pannonian-Dalmatian uprising" and "Bato uprising."  This four-year war, which lasted from 6 AD to 9 AD, saw a large deployment of Roman forces in the province, with whole armies operating across the western Balkans and fighting on more than one front.  In 8 AD the Breuci of the Sava valley surrendered, but it took another winter blockade and a season of fighting before the surrender in Dalmatia came in 9 AD .  The Roman historian Suetonius described this war as the most difficult conflict faced by Rome since the Punic Wars two centuries earlier.

Yuezhi: The Yuezhi or Rouzhi (, ) were an ancient people first reported in Chinese histories as nomadic pastoralists living in an arid grassland area in the western part of the modern Chinese province of Gansu, during the 1st Millenium BC.  After a major defeat by the Xiongnu, during the 2nd century BC, the Yuezhi split into two groups: the Greater Yuezhi ("Dà Yuèzhī" 大月氏) and Lesser Yuezhi ("Xiǎo Yuèzhī" 小月氏).

Sallust: Gaius Sallustius Crispus, usually anglicised as Sallust ( ; 86 – c. 35 BC), was a Roman historian, politician, and "novus homo" from an Italian plebeian family.  Sallust was born at Amiternum in the country of the Sabines and was a "popularis", an opponent of the old Roman aristocracy, throughout his career, and later a partisan of Julius Caesar.  Sallust is the earliest known Roman historian with surviving works to his name, of which "Catiline's War" (about the conspiracy in 63 BC of L. Sergius Catilina), "The Jugurthine War" (about Rome's war against the Numidians from 111 to 105 BC), and the "Histories" (of which only fragments survive) are still extant.  Sallust was primarily influenced by the Greek historian Thucydides and amassed great (and ill-gotten) wealth from his governorship of Africa.

Battle of Saticula: The Battle of Saticula, 343 BC, was the second of three battles described by the Roman historian Livy (59 BC – AD 17), in Book Seven of his history of Rome, Ab Urbe Condita, as taking place in the first year of the First Samnite War.  According to Livy's extensive description, the Roman commander, the consul Aulus Cornelius Cossus was marching from Saticula (in southern Italy) when he was almost trapped by a Samnite army in a mountain pass.  His army was only saved because one of his military tribunes, Publius Decius Mus, led a small group of men to seize a hilltop, distracting the Samnites and allowing the consul to escape.  During the night Decius and his men were themselves able to escape.  The next day the reunited Romans attacked the Samnites and completely routed them.  Several other ancient authors also mention Decius' heroic acts.  Modern historians are however sceptical of the historical accuracy of Livy's account, and have in particular noted the similarities with how a military tribune is said to have saved Roman army in 258 BC during the First Punic War.

Battle of the Allia: The Battle of the Allia was fought between the Senones (one of the Gallic tribes which had invaded northern Italy) and the Romans.  It was fought at the confluence of the rivers Tiber and Allia, eleven Roman miles (16 km) north of Rome.  The Romans were routed and subsequently the Senones sacked Rome.  The common date given for the battle is 390 BC.  This is based on the account of the battle by the Roman historian Livy and the Varronian Chronology, a Roman dating system.  The ancient Greek historian Polybius, who used a Greek dating system, derived the date 387/6 BC.  Plutarch wrote that the battle took place just after the summer solstice when the moon was near the full, a little more than three hundred and sixty years from the foundation of Rome.  That would be shortly after 393 BC.  Tacitus said that the battle took place the 15 before the Kalends of August, which is 18 July.

Supporting paragraphs: Prussia (region) Aesti
Answer: Aesti