The “Spanish Flu” killed an estimated 50-100 million people during a pandemic 1918-19. What if the story we have been told about this pandemic isn’t true? What if, instead, the killer infection was neither the flu nor Spanish in origin? Newly analyzed documents reveal that the “Spanish Flu” may have been a military vaccine experiment gone awry. In looking back on the 100th anniversary of the end of World War I, we need to delve deeper to solve this mystery. During the pandemic of 1918-19, the so-called "Spanish Flu" killed 50-100 million people, including many soldiers. Many people do not realize that disease killed far more soldiers on all sides than machine guns or mustard gas or anything else typically associated with WWI.