Pan Geng's Relocation of the Capital
When Tang of Shang established the Shang dynasty, the first capital was at Bo (pronounced "bó," modern-day Shangqiu, Henan Province). Over the following three hundred years, the capital city was relocated five times. This was due to constant struggles for the throne and internal rebellions within the royal family, compounded by frequent flooding in the lower reaches of the Yellow River. On one occasion, a massive flood completely submerged the capital, forcing them to move.