The Aegean Sea (eh-GEE-un) is a small ocean between Greece and Turkey, full of little islands. It is in the north-east corner of the Mediterranean Sea.
People have been sailing on the Aegean Sea since at least 5000 BC, when people began to trade in obsidian from the island of Melos. It was pretty easy to sail in the Aegean because you could go from island to island without being out of sight of land most of the time.
Many important historical events happened on the Aegean Sea. To begin with, there’s the story of the Trojan War and Odysseus‘ difficult trip home after the war. Then there’s the Persian Wars, with the Ionian Revolt, the Battle of Marathon, and the Battle of Salamis. After the Persian Wars, there’s the Athenian Empire, and then the Peloponnesian War, with the Athenian massacre at Melos.
Many years later, as the Romans took over the Mediterranean Sea, there was the Battle of Actium. Long years after that, Constantine founded the new Roman capital city of Constantinople. A thousand years after that, the Ottoman Empire conquered Constantinople and made it into their capital, calling it Istanbul. All of that happened in the Aegean Sea.