What changed europe's balance of power before world war i?

What city was taken back by sumerians in 2100 bc

What factors allowed philip ii of macedonia to conquer the greek city-states?

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.