I want to know the answer to the following question:
What group of people came with others who left the geographical and historical region in southeastern Europe, now a mutual  region between Greece and Albania ?
All the background I'm provided with is that "Traditionally, historians have believed that the Dorian invasion caused the collapse of the Mycenaean civilization, but it is likely the main attack was made by seafaring raiders (sea peoples) who sailed into the eastern Mediterranean around 1180 BC.". Is that enough to answer the question?