He proved that baseball wasn't just a white sport, that not just African Americans, but all "colored" races could play/do what they wanted as long as they put heart into it.
Although the United States was actively involved in World War I for only nineteen months, from April 1917 to November 1918, the mobilization of the economy was extraordinary. ... Over four millionAmericans served in the armed forces, and the U.S. economyturned out a vast supply of raw materials and munitions.
It would help if you added the options...
