Us history By Miranda jenny 1862 Homestead act 1869 Transcontinental railroad completed 1870 Industrialization begins to boom 1876 Telephone invented 1877 Reconstruction ends Period: 1877 to 1880 Gilded Age 1878 Light bulp invented 1887 Dawes act 1890 Klondike gold rush 1945 united nations 1945 germany divided 1947 the cold war 1947 truman doctrine Period: 1947 to 1991 the cold war 1948 marshall plan 1948 berlin airlift 1948 nato formed 1950 kim 2 sung invades south korea 1955 warsaw pact formed