Complex sentence: Although the Japanese divisions also fielded cavalry (they, however, usually dismounted when engaged in action, acting as mounted infantry) and occasionally specialized firearms were used on horseback, though most cavalrymen preferred the conventional "yari" (spear), Swope.
Split into simpler sentences: Although the Japanese divisions also fielded cavalry they, usually dismounted when engaged in action, acting more as mounted infantry. While specialized firearms were used on horseback, most cavalrymen preferred the conventional "yari" (spear), Swope.