Complex sentence: In April 1880, the Oregon Steam Navigation Company merged with the companies of Henry Villard and Ben Holladay to form the Oregon Rail and Navigation Company, a single transportation conglomerate encompassing river shipping, stagecoach, and railroad ventures.
Split into simpler sentences: In April 1880, the Oregon Steam Navigation Company merged with the companies of Henry Villard and Ben Holladay to form the Oregon Rail and Navigation Company. This created a single transportation conglomerate encompassing river shipping, stagecoach, and railroad ventures.