What was one of the business ventures of Marquis de Mores?

Marquis de Mores was primarily known for his endeavors in the cattle ranching business in the late 19th century, particularly in the region that would become North Dakota. He established the town of Medora and created the world's first refrigerated beef packing plant, which was a significant innovation at the time. His ranching operation centered around raising cattle and processing beef for both local consumption and export to larger markets. This venture not only aimed to profit from the booming demand for beef but also showcased the potential of ranching in the Great Plains.

While farming, railroad expansion, and gold mining were also important activities and industries in North Dakota during that era, they were not the main focus of Marquis de Mores. His legacy is most strongly tied to his cattle ranching efforts, which played a crucial role in shaping the agricultural and economic landscape of the region.