Context: Around 1200 BC, the Dorians, another Greek-speaking people, followed from Epirus. 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. The Dorian invasion was followed by a poorly attested period of migrations, appropriately called the Greek Dark Ages, but by 800 BC the landscape of Archaic and Classical Greece was discernible.

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 ?
Answer: the Dorians

Question: When did these groups make the migration ?
Answer: Around 1200 BC

Question: What civilization is the group credited with putting an end to ?
Answer: the Mycenaean civilization,

Question: Is it believed that they truly are responsible in full for the collapse ? 
Answer: it is likely the main attack was made by seafaring raiders (sea peoples)

Question: What areas were being explored by others in  by sea faring vessels and when are they believed to have arrived  ?
Answer: seafaring raiders (sea peoples) who sailed into the eastern Mediterranean around 1180 BC

Question: Where did the Mycenaean's originiate from in 1200 BC?
Answer: Unanswerable

Question: What civilization did the Mycenaean invastion cause to collapse?
Answer: Unanswerable

Question: At what time were the Mycenaeans considered raiders that dominated the Mediterranean?
Answer: Unanswerable

Question: What was the period of time called when the Mycenaeans were considered sea raiders?
Answer: Unanswerable

Question: What country was most affected by the Mycenaean raids in 800 BC?
Answer: Unanswerable

Question: What group of people never came with others who left the geographical and historical region in southeastern Europe, now a mutual region between Greece and Albania ?
Answer: Unanswerable

Question: When didn't these groups make the migration ?
Answer: Unanswerable

Question: What civilization is the group credited with starting ?
Answer: Unanswerable

Question: Is it believed that they truly aren't responsible in full for the collapse ? 
Answer: Unanswerable

Question: What areas weren't being explored by others in by sea faring vessels and when are they believed to have arrived ?
Answer: Unanswerable

Question: What group of people came with others who left the geographical and historical region in southeastern Europe, now a mutual region between England and Albania ?
Answer: Unanswerable

Question:  When did these groups reject the migration?
Answer: Unanswerable

Question: What civilization is the group credited with starting?
Answer: Unanswerable

Question:  Is it believed that they truly aren't responsible in full for the collapse?
Answer: Unanswerable

Question: What areas were being explored by others in by sea faring vessels and when are they believed to have left?
Answer: Unanswerable