Complex sentence: Charles was one of the few men in his army who regained a place of safety, about 3,000 were killed during the battle and a further 10,000 were taken prisoned at Worcester, most of the rest were captured shortly afterwards as they fled.
Split into simpler sentences: Charles was one of the few men in his army who regained a place of safety; about 3,000 were killed during the battle and a further 10,000 were taken prisoner at Worcester. Most of the rest were captured shortly afterwards as they fled.