[학술논문] 바다로 보는 한국사
Although, until the Three Kingdoms Period, mainly the coastal sea roads had been relied on, ever since the Unified Silla(新羅), the sea roads that cross or divide the Yellow Sea had been newly pioneered. With the sea roads getting diversified and expanded, the civilization interchanges in East Asia had been developing innovatively. Such a trend had continued until the Koryo(高麗) Dynasty.
However