Complex sentence: Over the Warring States period, many of the seven states underwent bureaucratic and military reforms in order to mobilise resources on a greater scale; this led to an intensification of warfare over the period, but also led to economic and cultural developments on a large scale.
Split into simpler sentences: Over the Warring States period, many of the seven states underwent bureaucratic and military reforms in order to mobilise resources on a greater scale. This led to an intensification of warfare over the period, but also led to economic and cultural developments on a large scale.