What was john D Rockefellers strategies?

John D. Rockefeller's strategies for building Standard Oil and dominating the oil industry included aggressive cost-cutting, vertical integration, and strategic partnerships. He focused on controlling every aspect of production and distribution to minimize costs and maximize efficiency. Additionally, Rockefeller employed practices like secret rebates and preferential treatment from railroads to undercut competitors. His approach ultimately led to the creation of a near-monopoly in the U.S. oil industry.