The movie 300 was based around 480 B. 300 focuses on the Battle of Thermopylae which was a battle between an alliance of Greek city-states and the Persian Empire. 7,000 men formed a Greek army to fight against about 150,000 Persians. The Greeks held off the Persians for 7 days. Once Persians found out about a path to get behind Greek lines, most of their army was killed. Although the Spartans were defeated, they fought a good battle for the number of men they had. The Persians had about double the amount of men and the Spartans still put up a good battle. The movie 300 begins to show what the battle was like between the Spartans and the Persians.
The film starts by showing Leonidas I from childhood to kingship and shows how Spartan warriors were raised. Young Spartan men were brutally raised to be tough, show no fear and never surrender. Years later, Persian messengers show up at the gates of Sparta demanding "earth and water." Spartans replied by forcing the Persians into a well. Leonidas then shared his plans of funneling the Persians between the rocks and sea to the Ephors, who consulted the Oracles, and they quickly denied war because of Carneia, a Spartan celebration. Although Leonidas was denied permission of war, he follows through with his plan by taking 300 of his best soldiers to act as his "bodyguards" as he headed north to begin war. As the Spartan army marched toward Thermopylae, they were joined by the Arcadians. Meanwhile, Leonidas came across a deformed Spartan, Ephialtes, who asks to redeem his father's name by joining the army. Leonidas declined because he could not hold his shield properly, which would break the phalanx formation. At Thermopylae, Spartans built a stone wall which angered the Persian Emissary. A Spartan soldier, Stelios, then cut off the Persian Emissary's arm and ordered him to go back to Persian lines and warn Xerxes, the Persian King, of what was coming.