Last year, Great Chu and Qiuzi Country allied with 150,000 troops to fight against a foreign tribe's 20,000 elite soldiers. Although Great Chu and Qiuzi Country ultimately triumphed, the cost was too steep: of the 150,000 allied troops, fewer than 30,000 survived, while the enemy's 20,000 elite managed to have 5,000 escape. Carefully considering the outcome, Great Chu and Qiuzi Country were actually the ones who suffered a disastrous defeat.
Nobody had expected that the foreign tribe's 20,000 elite would come to battle armed with such deadly weapons, an irony being that these weapons had been developed after the technique of gunpowder had spread from Great Chu.