Complex sentence: By the 1920s the Vollrath Company was producing a catalog of more than 800 products; however, its production facilities were affected by the Great Depression, and during World War II the company had moved exclusively into military defense manufacturing.
Split into simpler sentences: By the 1920s the Vollrath Company was producing a catalog of more than 800 products. It was affected by the Great Depression, and during World War II the company had moved exclusively into defense manufacturing.