I need a answer quick before I fall further behind 1. How did Sparta help defeat the Persians? 300 soldiers in Thermopolis to hold off 250,000 Persians for 3 days
2. How did Athens help defeat the Persians?
3. What were the major battles?

2. Athens navy managed to defeat Persian army in the narrow straits near Salamis in 480 BC thus ending their invasion on Greece.

3. The most important battles were Battle of Marathon, Battle of Thermopolis, Battle of Salamis and Battle of Plateau.

Explanation:

Greco-Persian war fought in the 5th Century BC was one of the first major wars between European and Asian civilization. Greek city-states managed to defy the world largest empire in that period.

Themistocles managed to defeat Xerxes in one of the most famous naval battles in history, thus deciding the outcome of the war.

i think it would be reparing roads  

answer; i believe that the correct answer is,lies(political rhetoric);