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  • in the 1880s, dr. john kellogg, operator of a sanatorium in battle creek, michigan, developed a ready-to-eat cereal he named corn flakes. the nation's first instant breakfast," packaged by his brother w. k. kellogg, was an instant success. the kelloggs soon had competition from charles w. post, a former patient at the sanatorium, who began to market a very similar product under the name post toasties. the conflict became known as the "cereal wars." both the post and kellogg companies survived to become major corporations that still make cereal today.