question: The Roman commander Julius Ceasar referred to Germania as the vassal state ruled by who?
answer: Napoleon's brother Jérôme Bonaparte
context: Title: Kayin Ba
  Passage: Kayin Ba (Burmese: ကရင်ဘ , ] ; 1253–1342) was governor of Toungoo (Taungoo) from 1325 to 1342.  Prior to his governorship, the commoner had served all the rulers of the frontier state since its creation in 1279, eventually rising to mayor of Toungoo by the 1310s.  Taking advantage of the rivalry between King Uzana I and Crown Prince Kyawswa I at Toungoo's overlord Pinya, he seized the governorship in 1325 by assassinating Gov. Saw Hnit.  While he remained a nominal vassal of Pinya, Ba ruled the region like a sovereign ruler for the next 17 years, transforming the hitherto minor vassal state into a regional power.
  Title: History of Germany
  Passage: The concept of Germany as a distinct region in central Europe can be traced to Roman commander Julius Caesar, who referred to the unconquered area east of the Rhine as "Germania", thus distinguishing it from Gaul (France), which he had conquered.  The victory of the Germanic tribes in the Battle of the Teutoburg Forest (AD 9) prevented annexation by the Roman Empire, although the Roman provinces of Germania Superior and Germania Inferior were established along the Rhine.  Following the Fall of the Western Roman Empire, the Franks conquered the other West Germanic tribes.  When the Frankish Empire was divided among Charlemagne's heirs in 843, the eastern part became East Francia.  In 962, Otto I became the first emperor of the Holy Roman Empire, the medieval German state.
  Title: Kingdom of Westphalia
  Passage: The Kingdom of Westphalia was a kingdom in Germany, with a population of 2.6 million, that existed from 1807 to 1813.  It included territory in Hesse and other parts of present-day Germany.  While formally independent, it was a vassal state of the First French Empire and was ruled by Napoleon's brother Jérôme Bonaparte.  It was named after Westphalia, but this was a misnomer since the kingdom had little territory in common with that area; rather the kingdom mostly covered territory formerly known as Eastphalia.
citations: Kingdom of Westphalia History of Germany