1) Around 2000 BC, Indo-European people including the Mycenaeans began entering Greece. In 1200 BC, the Dorian people attacked Greece. The first king of Greece was Otto of Bavaria in 1852.
2) Greece is located at 39°N 22°E. Key geographical features include Mount Partita, the Alfas River, and the Mediterranean Sea which covers 131,940 square kilometers.
3) Major cities in Greece include Athens, the capital, and Thessaloniki, the second largest city. The population was 11.3 million in 2013.