Gǔdài de Měnggǔ qíbīng suǒxiàng-pīmǐ, zhēngfú le dàpiàn lǐngtǔ.
The ancient Mongol cavalry swept all before them and conquered vast territories.
Tips
memory
所向 = wherever one goes; 披靡 = (grass/enemy) blown aside. Picture a force so powerful it parts everything in its path like a strong wind parting grass.
history
From 《史记·项羽本纪》: when 项羽 charged with a roar, the Han army scattered before him. The phrase came to mean an unstoppable advance that sweeps every obstacle away.