On 10 July the Japanese again confronted the Hakka militias, this time on the heights of Chienbishan (Traditional Chinese: 尖筆山) near Miaoli. The Formosans were entrenched, but had no modern artillery. The Japanese attacked from two sides and defeated them. Japanese casualties were only 11 killed or wounded, while the bodies of 200 dead Formosans were recovered from the battlefield. The Japanese also took 110 prisoners, one of whom was the 19-year-old militia leader Chiang Shao-tsu. On 11 July, Chiang committed suicide by taking opium. Wu Tang-hsing thereupon assumed command of the Hakka militias, and on 23 July led them back in retreat to Miaoli.