What is the main goal of political parties

What are the two powers that the federal and state governments share?

Historians have recently discovered a historical journal published in the early twentieth century. the journal contains facts based on original sources about the downfall of the early byzantium empire. historians consider this long-lost journal to be a breakthrough in their understanding of the byzantium empire. based on this information, the journal is a source.

What do u think caused the size of the roman empire to change