1869 was the year the transcontinental railroad was completed
I believe its the 20th Century because George C Marshall wasn't born until the late 19th century.
How did british propaganda influence america public opinion? I would say isolationism. have a wonderful rest of the day.
Violet
When white light is spread apart by a prism or a diffraction grating, the colours of the visible spectrum appear. The colours vary according to their wavelengths. Violet has the highest frequencies and shortest wavelengths, and red has the lowest frequencies and the longest wavelengths.