In 1894, as the First Sino-Japanese War broke out, Cihou Fort was equipped with four British eight-inch Armstrong breech-loading guns. Early the next year, on the first of February 1895, an explosion tore through the fort. About one ton of locally made gunpowder blew up for reasons that remain unknown. The blast cracked the protective walls in many places and killed about a hundred soldiers. Liu Chengliang, the adopted son of the commander Liu Yongfu, then took over the defense and led the repairs. The real test came that October, when Japan's forces arrived to take Taiwan. At 6:55 on the morning of the fifteenth, the cruiser Yoshino, leading ships including Akitsushima, opened fire. The Black Flag Army, under Liu Yongfu and Liu Chengliang, answered with a fierce artillery duel that lasted until evening. In the end, Japanese forces broke through and landed. The fort's story did not end there. Late in the Japanese period, during the Pacific War, the fort was turned into an anti-aircraft position. Its original guns were removed and several bunkers were added. After the war, the army held the hill and added machine gun nests, bunkers, barracks and tunnels. For decades this was a restricted military zone, and the old fort slowly decayed.