Complex sentence: Just over 30 years later, in 1978, Livingston launched into the customs brokerage business and mergers and acquisitions led this aspect of the company to overshadow the warehousing and distribution businesses.
Split into simpler sentences: Just over 30 years later, in 1978, Livingston launched into the customs brokerage business. Through mergers and acquisitions, this aspect of the company finally overshadowed its warehousing and distribution businesses.