What new power arose in the Mediterranean and threatened Greece?

The new power that arose in Mediterranean after the fall of Mycenaean civilization and threatened Greece was the rise of the Macedon. The Macedon kingdom emerged in northern Greece during the 7th century BC. In the 4th century BC, under the leadership of King Philip II, Macedonia became a strong military power and expanded its territory. Philip's son, Alexander the Great, continued the expansion of the Macedon empire, conquering vast territories in Asia, Africa and Europe. The Macedon conquest led to the spread of Greek culture and Hellenism throughout the ancient world.