What is the significance of the years 1914-1918 as a turning point in American history?

What ways did the allies help to the Continental Army? What is the value of a 1929 ten dollar bill with red numbers issued from the federal reserve bank of new york? What is the value of an 1893 wheat back penny? How did Norbert Rillieux die? Why is the union threaten by slavery? What is the value of an 1804 silver lady liberty dollar coin in good condition? What is the value of an 1890 Lady Liberty penny? Why were there few transportation innovations in the South compared to the North? How did the British Crown attempt to bring peace to the frontier following Pontiac's Rebellion? What are the main social classes in the colonies? What is the value of 1911 half dollar? What is the value of a 1923 US 1 million dollar bill with a picture of President Lincoln? As a result of the labor policies of the New Deal many stronger were formed? What is the value of a gold 1936 buffalo nickel? When did huggies originate? What countries were the u.s. enemies during the second wold war? Why do some sources claim that the US is the 3rd largest country in area but other sources claim that China is the 3rd largest and the US is 4th largest? 1963 half dollar worth? What is the climax of the movie Jose rizal (1998)? What is the value of a 1934 Indian head penny?