With his sizable fortune in hand, Armour then moved to Milwaukee, Wisconsin, starting a wholesale grocery business. In Milwaukee, Armour formed business partnerships with Frederick Miles in the grain business in 1859. He worked with Miles for three years before he partnered with John Plankinton in the meatpacking industry, creating the company Plankinton, Armour & Company. Philip helped Plankinton start up "a new plant on the Menominee River so that the firm could handle government pork contracts." They experienced prompt success through the distribution of sought after meats, produce, and grains to westward-moving settlers and fortune-seekers. It was also during this period when Armour married Malvina Belle Ogden in 1862. Armour demonstrated his uncanny ability as a young businessman by taking advantage of changing meat prices during and after the Civil War. According to Deborah S. Ing, author of Philip Armour's biography in the American National Biography Online, "the most important business coup of Armour's early career occurred near the end of the Civil War when he predicted heavy Confederate losses and thus the dropping of pork prices…he made contracts with buyers at $40 per barrel before prices plummeted to $18 when the war ended in a Union victory. This deal netted him a profit of $22 per barrel or a total of $1 million to $2 million." Armour's savvy decision elevated the status of Plankinton, Armour & Co., allowing the firm to expand into other cities.