Step 1 : Introduction to the question "What did Americans call hamburgers during Word War I?"
...Another version of the creation of the hamburger is that of German cook Otto Kuasw, who created a very popular sailors' sandwich made of a fillet of beef patty fried in butter, served with a fried egg, between two toasted buns in 1891, at a post in Hamburg, Germany. History of the hamburger ......
Step 2 : Answer to the question "What did Americans call hamburgers during Word War I?"
When war broke out with Germany in 1917, a wave of anti-German hysteria swept across the country, and everyone was eager to distance themselves from German loyalties. The names of German foods were purged from restaurant menus; sauerkraut had been renamed “liberty cabbage,” while hamburgers became “liberty steaks”. Frankfurters, obviously a very German name, was deemed unacceptable during World War I. In some places they were called “liberty sausages,” but it was another term that stuck—the hot dog.