Complex sentence: Leonidas then visits the Ephors, proposing a strategy to drive back the numerically superior Persians through the Hot Gates; his plan involves building a wall in order to funnel the Persians into a narrow pass between the rocks and the sea.
Split into simpler sentences: Leonidas then visits the Ephors, proposing a strategy to drive back the numerically superior Persians through the Hot Gates. His plan involves building a wall in order to funnel the Persians into a narrow pass between the rocks and the sea.