Complex sentence: This rear-guard was soon cut to pieces by the Muslims, and Muhakim fell to the arrow of the Caliph's son, Abdur-Rahman.Soon muslims arrived at the walled garden where a little over 7,000 apostates, Musailima among them, had taken shelter.
Split into simpler sentences: This rear-guard was soon cut to pieces by the Muslims, and Muhakim fell to the arrow of the Caliph's son, Abdur-Rahman. Soon the Muslims arrived at the walled garden, where a little over 7,000 apostates, Musailima among them, had taken shelter.