This is the timeline for major events of Centralized Empire from 395 AD.
395 AD: Roman Empire is split into halves (Western, Eastern)
445 AD: Death of Stilico
451 AD: Aetius defeats the Huns
457 AD: Majorian ascends to throne
461 AD: Death of Aetius
505 AD: Julia I ascends to throne with her husband Clovis, the Frank. Roman-Frank Unison begins.
751 AD: Pepin revolt
924 AD: Engeltrude I ascends to throne with her husband Otto I, the German. Roman-German Unison begins.