Short answers, pulled from the story.
Pannonia was a Roman province bounded by the Danube on the north and east, Noricum and upper Italy on the west, and Dalmatia and upper Moesia on the south. Its territory covered parts of modern western Hungary, western Slovakia, eastern Austria, northern Croatia, north-western Serbia, northern Slovenia, and northern Bosnia and Herzegovina.
Illyricum was divided into Dalmatia and Pannonia in 8 or 9 AD, following Tiberius's victory in the Bellum Batonianum. That revolt itself had lasted three years, beginning with an uprising in 6 AD.
The revolt was led by Bato the Breucian of the Breuci and by Bato the Daesitiate, alongside Pinnes, of the Daesitiates. Bato the Breucian surrendered in 8 AD but was later captured and executed by the Daesitiates, who fought on until Bato the Daesitiate laid down his arms in 9 AD.
Trajan split Pannonia into Pannonia Superior and Pannonia Inferior between 103 and 107 AD. Under Diocletian, it was divided again into four provinces: Pannonia Prima, Pannonia Valeria, Pannonia Savia, and Pannonia Secunda.
In 433 AD, Rome handed the territory over to Attila in exchange for his help subduing the Burgundians, who were attacking Gaul. Flavius Aetius, magister militum of the Western Roman Empire, formally ceded parts of Pannonia to the Huns that same year.
Pannonia produced oats and barley, which its people brewed into a beer called sabaea, and the province was known for a breed of hunting dogs. Timber was a major export before Probus and Galerius cleared its forests, and it probably held iron and silver deposits as well.