Riverboating
During the Mexican-American War, King's friend Kenedy enlisted as ship master, running men and supplies to the United States Army along the Rio Grande River, and in 1847, Kenedy convinced King to join the war effort on the Rio Grande, where King worked on the transport Colonel Cross, ferrying army supplies between Reynosa, Camargo, and Matamoros. In 1850, following the war, King, Kenedy and two other partners formed the M. Kenedy and Company steamboat firm, renamed in 1866 to King, Kenedy and Company when the two other partners where bought out. This firm achieved "nearly monopolistic" control on the Rio Grande for most of the years between 1850 and 1874, when the partnership was dissolved.
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