According to the CDC, there are now approximately 100,000 Americans who are aged 100 years or more, a figure that has doubled since 2000. These people were alive at a time and on a day when American history changed forever: Friday, April 6, 1917. As we reach the centennial of that date it is troubling that many Americans are unaware of its significance. 100 years ago the United States entered World War 1 as a combatant ally to Great Britain, France, Russia and Italy, and their Empire nations. After three years of desperately sought neutrality, President Woodrow Wilson was forced by the spring of 1917 to engage the U.S. in the most dreadful, costly and far-reaching conflict of human history to date, a “Great War” that had ravaged Europe and other global theaters for three years since August 1914. How did American get embroiled in this titanic struggle and what did it mean for the next 100 years?