1840-1860 By charlottewelch Period: Jan 1, 1840 to Jan 1, 1860 TIMESPAN Oct 14, 1844 Samuel Morse sends first telegraph message Apr 25, 1846 War with Mexico begins Feb 2, 1848 Treaty of Guadalupe Hidalgo signed Jan 29, 1850 Compromise of 1850 passed Feb 14, 1859 Oregon admitted as a state