What happened during the Dark Age during the 300 year period​

Mediterranean warfare and Sea Peoples Around this time large-scale revolts took place in several parts of the eastern Mediterranean and attempts to overthrow existing kingdoms were made as a result of economic and political instability by surrounding people, who were already plagued with famine and hardship.

Explanation:

Brainliest?

four sitting presidents have been assassinated while in office but the first was abraham lincoln,