As Europe was ravaged by fighting, German immigrants in the US suffered harassment, internment, lynchings - and even the humiliation of being tarred and feathered 

Although a little-remembered part of history today, America was completely wracked by the fear and paranoia that swept from coast to coast during the Great War 

The United States declared war on Germany in April 1917 and helped lead the Allies to victory. But before that, many Americans were terrified of the German threat growing on the other side of the world