Complex sentence: Admiral supplied the US military with electronic equipment during World War II, and was one of the major TV manufacturers in the early era of that medium, enabling it to branch out into major appliances such as refrigerators by the 1950s.
Split into simpler sentences: Admiral supplied the U.S. military with electronic equipment during World War II, and was one of the major television manufacturers in the early era of that medium. Success in television sales enabled the company to branch out into major appliances such as refrigerators by the 1950s.