Why did the revolutions and nationalist movements of 1830 fail as compared to the success of 1848?

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 was the goal of the united states' invasion at the bay of pigs?

Which beat summarizes the intent of franklin roosevelt hundred day legislation and programs