In 300, it's spring 480 BC, Persian King Xerxes - continuing his father Darius' master plan to conquer the Hellenic city - states, arrives in Hellas. The previous Persian invasion and diplomatic attempts have already turned most northern Hellas tribes and states to the Persian side. However, the people of Athens and Sparta, the largest Hellenic powers at the time, feel quite insulted by the Persian emissaries' request to surrender to Xerxes, and so slay them.