| A | B |
| America's Foreign Policy in 1914 | Isolationism / Neutrality |
| Reason for America to stay Neutral | Both Germany and Great Britain were friendly with the USA |
| Reason for America to stay Neutral | America traded equally with both the Central and Allied nations |
| Reason for America to stay Neutral | All the major warring countries had sent thousands of immigrants in the USA |
| Reason for America to stay Neutral | America had no clear enemy or ally in Europe |
| Lusitania | German u-boat sank this British cruise liner killing Americans |
| Impact of the Lusitania Incident | Turned American public opinion against Germany, Convinced President Wilson to begin preparations to build up the army and navy (armed neutrality) |
| Sussex | German u-boat sank the French cruise liner killing Americans |
| Impact of the Sussex | America forced Germany to sign the Sussex Pledge |
| Sussex Pledge | promise that Germany would not sink non-military ships without warning and without saving lives |
| Unrestricted Submarine Warfare | German u-boats attacked any enemy ships on the seas without warning or trying to save lives |
| Revocation of the Sussex Pledge | Germany broke the Sussex Pledge and resumed unrestricted submarine warfare |
| Impact of the breaking of the Sussex Pledge | Convinced most Americans that Germany was an enemy, Showed that America could not shield herself from the war |
| Zimmermann Note | Germany sent a secret message to Mexico proposing an alliance between Germany and Mexico if the USA entered the war |
| Impact of the Zimmermann Note | Thoroughly convinced Americans that Germany was planning to attack the USA, Made American politicians look weak / cowardly if they did not defend American honor against Germany |
| Russian Revolution | Czar Nicholas (dictator) of Russia was overthrown and a provisional Democratic government was set up in Moscow |
| Impact of the Russian Revolution | A new democratic Russia made the Allies seem to be a clear choice for the USA |
| Make the world safe for democracy | Wilson's quote that was meant to rally America for war |
| Propaganda | American and British-made posters, speakers, songs, demonstrations, political cartoons, and editorials advocated the virtues of the Allied nations and the evils of the Central Power nations |
| Impact of propaganda | American and British propaganda turned American public opinion against the Central Powers |
| Sabotage | German spies, Central Power sympathizers, American terrorists engaged in the sabotage of American military, shipping, and industrial sites |
| Impact of sabotage | Made Americans feel that they were being attacked in their homeland |
| April 6, 1917 | The US Congress formally joined the Allies and declared war against the Central Powers. |
| Events that solidified America's clear enemy | Unrestricted Sub Warfare, Lusitania, Sussex, Revoking of Sussex Pledge, Zimmermann Note, Propaganda, Sabotage |
| Eventa that solidified America's clear ally | Russian Revolution, Propaganda |