Complex sentence: When the manufacturer of Kalsø Earth Shoes was unable to keep up with demand, franchise owners pursued litigation against the United States distributor, and retail sales of the brand in the U.S. were discontinued by the late 1970s.
Split into simpler sentences: When the manufacturer of Kalsø Earth Shoes was unable to keep up with demand, franchise owners pursued litigation against the United States distributor. Retail sales of the brand in the U.S. were discontinued by the late 1970s.