Later with his brother, Herman, he again entered the grain business and built several meat packing plants in the Menomonee River Valley. After individually prospering in three different regions, Philip, Herman and Joseph reconvened in 1867 to form the flagship Armour & Company in Chicago, which packed hogs exclusively for the first eight years of its existence. The company which soon became the world's largest food processing and chemical manufacturing enterprise, headquartered in Chicago, Illinois. Armour & Co. was the first company to produce canned meat and also one of the first to employ an "assembly-line" technique in its factories.