American Neutrality During WWI Flow Chart (World War I). Flow charts are an excellent way to help students maximize learning and connect events in a cause and effect relationship. This chart explores what it means to be "neutral". This unique flow chart style graphic organizer explores U-Boats, the Lusitania, the Sussex Pledge, the Presidential Election of 1916, the Zimmerman Note, the Russian Revolution, Declaration of War and more! This is an essential tool when teaching any introductory unit on World War 1 The Great War! Typed Key Included.