American Entrance to World War I

The act of Germany sinking ships without warning, including passenger vessels. This angered the US as it violated the freedom of the seas.

A 1915 event where a German U-boat torpedoed and sank a British passenger liner, killing over 100 Americans. This incident fueled public outrage against Germany.

A secret diplomatic message sent by Germany to Mexico during World War I, proposing an alliance in exchange for Mexico reclaiming lost territory from the US. The US intercepted this telegram, leading to a public outcry and increasing war sentiment.

The combination of events that led to the US entry into World War I, including the sinking of the Lusitania, German unrestricted submarine warfare, and the Zimmerman Telegram.

The US's decision to officially join World War I in 1917, sending troops to fight alongside the Allied Powers.

A ceasefire agreement that formally ends hostilities in a war.

A plan for a just and lasting world peace, proposed by U.S. President Woodrow Wilson after WWI.

A peace that aims to avoid humiliating the defeated side, promoting understanding and cooperation.

The four main Allied powers (United States, Great Britain, France, and Italy) that negotiated the Treaty of Versailles.

The treaty that officially ended WWI, imposed harsh terms on Germany, and shaped the post-war world.

A set of principles proposed by President Woodrow Wilson in 1918, outlining a plan for a just and lasting peace after World War I.

The idea that peace should be achieved without any one side feeling like they won, preventing resentment and future conflict.

The principle that nations and ethnic groups should have the right to determine their own governments and destinies.

An organization proposed by Wilson to promote international cooperation and prevent future wars.

The idea that the seas should be open to all nations for trade and navigation without restrictions.

A cease-fire agreement that brought an end to fighting in World War I.

The German government that replaced the Kaiser after his resignation in 1918.

The Kaiser's resignation and flight to the Netherlands marked the end of Germany's monarchy.

A type of government where citizens elect representatives to make decisions.

The belief that the Allies would be lenient with Germany if it replaced its monarchy with a democratic government.

The Treaty of Versailles was the agreement that officially ended World War I, dictating terms for Germany and establishing new European borders.

The 'Big Four' (France, Britain, USA, and Italy) were the main powers who negotiated the terms of the Treaty of Versailles.

Germany was forced to pay reparations, or compensation, for the damage caused during World War I.

The Treaty of Versailles severely limited Germany's military capabilities, restricting its army, navy, and forbidding it from having an air force.

Article 231 of the Treaty of Versailles, known as the War Guilt Clause, placed full responsibility for causing World War I on Germany.