Livestock production flourished in California and the Southwest, but few markets existed for end products such as meat, hides, and tallow (for making candles). By the mid-1700s, long trains of pack mules would transport these products to Mexico City and return with supplies. American ships began servicing California ports in the early 1800s and traded for the same materials. For the first time, ranchers had local markets for their animals. Huge roundups were held to collect cattle, and the hard-riding vaqueros controlled the chaos. Known for expert horsemanship and roping skills, vaqueros were said to only dismount for a chance to dance with pretty girls. - See more at: http://www.americancowboy.com/article/history-vaquero#sthash.XdYzYoA6.dpuf