What is associated with: 1919 and sixpence?

What is associated with: 1917 he asks the us congress for a declaration of war on germany? What is associated with: 1917 the us declares war on this hyphenated kingdom? What is associated with: 1917s king coal by this author was to the mining industry what an earlier work had been to the… What is associated with: 1918 no 2 absolute freedom of navigation upon the seas outside territorial waters? Based on the clue '192 people were killed trying to cross this infamo...', what is the answer? What is associated with: 1920 by eugene oneill? What is associated with: 1920 calvin coolidge? What is associated with: 1920 gopher prairie?