Complex sentence: In 1878, the gang held up two stagecoaches and four trains within 25 miles of Dallas, and became the object of a manhunt by Pinkerton National Detective Agency agents and by a special company of the Texas Rangers headed by Captain Junius Peak.
Split into simpler sentences: In 1878, the gang held up two stagecoaches and four trains within 25 miles of Dallas. They became the object of a manhunt by Pinkerton National Detective Agency agents and a special company of the Texas Rangers headed by Captain Junius Peak.