Why was Thermopylae the first step in the creation of more unified Greek nation?
Well, when the Greeks came together to defend Thermopylae against the Persian invasion, it showed them the power of unity and working together towards a common goal. This shared experience helped to break down barriers between the different city-states and foster a sense of solidarity among the Greeks. It laid the foundation for future collaborations and alliances that eventually led to a more unified Greek nation.