Complex sentence: Although their commander (Major Fukushima) insisted that his officers properly reconnoitre the objective and plan their approach Allen, p.217 in contrast to 58 Regiment's hasty tactics, his infantry became lost trying to approach the position at night.
Split into simpler sentences: Although their commander (Major Fukushima) insisted that his officers properly reconnoitre the objective and plan their approach Allen, p.217 in contrast to 58th Regiment's hasty tactics. However, his infantry became lost trying to approach the position at night.