Horse Timeline By nf12 Jan 1, 1500 Spanish Conquistadors came to the Americas Coronado sets out for North America, with 150 horsemen. Dec 11, 1519 Coronado sets out for North America, with 150 horsemen. Dec 11, 1539 Desoto sets out with 237 horses Dec 11, 1547 Antioni de Mendoza (The first governor of Mexico) had 1500 horses Dec 11, 1650 Stroh gave us nothing for this. It kinda bites. Dec 11, 1790 Average American Farm is 100 Acres Dec 11, 1800 Horse Population Drastically Increased. Dec 11, 1830 Farm machines now require stronger animals to pull them, AKA the horse. Dec 11, 1832 First Firehorse purchased in New York Dec 11, 1850 Horse becomes an integral part of the Fire Department Dec 11, 1855 Congress Authorizes raising of the two horse regimen Dec 11, 1862 Congress passes Morrill LAnd Grant Act Dec 11, 1867 Rural Population of Horses estimated at 8 million Dec 11, 1868 First veterinary college opened at Cornell University Dec 11, 1875 First Kentucky Derby Dec 11, 1880 Horse car lines operating in every city in America Dec 11, 1883 National Horse Show Begins Dec 11, 1886 First rodeo with paid admission in Presscott, Arizona. Dec 11, 1890 Horses averaged 2000lbs Dec 11, 1898 Horses are used by the famous rough riders of the Spanish-american war. Dec 11, 1900 Average horse size 1200-1500lbs Dec 11, 1906 1500 Firehorses in Existance Dec 11, 1910 500 Acre Wheat Farms not uncommon Dec 11, 1911 Team events begin Dec 11, 1917 Horses helped tip the balance in in favor of allied victory in WWI