I.G. Farben, a German company, was the largest chemical manufacturing enterprise in the world during the early part of the 20th century. As such the company had many holdings in a variety of countries, including America. The American holdings of I.G. Farben included Bayer Co., General Aniline Works, Agfa Ansco, and Winthrop Chemical Company.
I.G. Farben was critical in the development of the German economy and war machine leading up to WWII. During this time I.G. Farben's international holdings along with its international business contracts with companies like Standard Oil, DuPont, Alcoa, and Dow Chemical were crucial in supplying the Nazi regime with the materials needed for war as well as financial support.