Complex sentence: In 1966, Phillips entered the West Coast market by purchasing Tidewater Oil Company's refining and marketing properties in that region and rebranding all Flying A distributorships and service stations to Phillips 66.
Split into simpler sentences: In 1966, Phillips entered the West Coast market by purchasing Tidewater Oil Company's refining and marketing properties in that region. At that time, all Flying A distributorships and service stations in the far west were rebranded Phillips 66.