Complex sentence: The early clashes stemmed from accusations of cattle and horse rustling leveled at both parties, and some of both the Tewksburys and Grahams were arrested on charges made by another rancher, Jim Stinson, that they all had taken part in rustling cattle from Stinson's ranch.
Split into simpler sentences: The early clashes stemmed from accusations of cattle and horse rustling leveled at both parties. Some of both the Tewksburys and Grahams were arrested on charges made by another rancher, Jim Stinson, that they all had taken part in rustling cattle from Stinson's ranch.