In 1863 Rockefeller entered this business?

In 1863, John D. Rockefeller entered the oil industry by investing in a small oil refinery in Cleveland, Ohio. This venture marked the beginning of his significant influence in the oil sector, which would eventually lead to the establishment of the Standard Oil Company in 1870. Rockefeller's innovative practices and focus on efficiency transformed the oil industry and made him one of the wealthiest individuals in history.