Short answers, pulled from the story.
The Roman Empire split the province of Pannonia in 103 AD to create two distinct territories including Pannonia Superior. This division established Pannonia Superior with its capital at Carnuntum.
Septimius Severus served as governor of the province before launching his bid for power. He made his move from this position in April 193 CE and used control over military forces stationed here to claim the imperial throne.
Emperor Diocletian chaired a historic meeting in Carnuntum on the 11th of November 308 alongside co-emperors Maximian and Galerius to resolve rising tensions. The group aimed to stabilize the Tetrarchy system that governed the empire.
Vindobona served as a major city within Upper Pannonia before becoming modern Vienna while Siscia stands today as Sisak in Croatia. Iovia Botivo is now known as Ludbreg in Croatia and Aquae Balissae exists today as Daruvar in Croatia.
The list includes names like Publius Metilius Nepos who governed from 106 until 107 or 108 and Lucius Minicius Natalis who took office around 113 or 114. Septimius Severus governed from 191 to 193 before becoming emperor after a long series of administrators including Marcus Nonius Macrinus and Lucius Dasumius Tullius Tuscus.