By Frank Morris
Kansas City, MO – World War One was a cataclysm that destroyed the old world order, killed at least 9 million combatants, and vaulted the United States into world prominence. But the conflict, with its horrific trench warfare and weapons of mass destruction, has been largely overshadowed by World War Two. The hard lessons of the Great War' are now on display at the National World War I Museum in Kansas City.