Emergence of the Americas in Global Affair - The USA and the First World War

Reasons for US neutrality

Driven by the desire to continue trade, fear of internal ethnic conflict, and Wilson's 1914–1916 desire to act as a global mediator for peace.

US economic support for Allies

The massive provision of loans and supplies (1914–1917) created deep economic ties, making neutrality lopsided and pulling the US toward the Allied cause.

Blockade by German submarines

The use of U-boats against merchant shipping starting in 1915; directly violated US maritime rights and fueled public outrage.

Lusitania

The 1915 sinking of a British passenger ship with Americans aboard; a critical flashpoint that turned US public opinion against Germany.

Germany's unrestricted submarine warfare

Germany's January 1917 decision to attack all ships; the final catalyst that violated neutrality and forced the US to declare war in April 1917.

Wilson’s 1916 campaign pledge

"He Kept Us Out of War"; a political promise that conflicted with the economic and security realities that forced US entry into the conflict.

Zimmerman Telegram

The 1917 German proposal to Mexico for an alliance and recovered territories; revealed a direct security threat that galvanized US support for war.

Selective Service Act

The 1917 law that instituted the draft; mobilized millions of men to ensure a military force capable of fighting in Europe.

Committee on Public Information

Established in 1917; the government's propaganda agency (led by George Creel) used media to manufacture consent and unify the nation.

Women in the workplace - during the war

1917–1918; wartime labor shortages allowed women to fill industrial roles, promoting social freedom and economic autonomy.

Women’s suffrage / 19th Amendment

Political movement accelerated by women’s 1917–1918 industrial contributions; led to the 1920 ratification of the constitutional right to vote.

Espionage and Sedition Acts

1917–1918 legislation; criminalized anti-war speech and dissent to maintain national unity during the mobilization effort.

Eugene V. Debs

Socialist leader jailed in 1918 under the Sedition Act; symbolized the government's aggressive crackdown on political dissent during wartime.

Bolshevik Revolution / Treaty of Brest-Litovsk

The 1917 Russian collapse and subsequent 1918 exit from the war; allowed Germany to move divisions to the Western Front, creating an urgent need for US troops.

14 Points

Wilson's 1918 plan for post-war peace; served as a blueprint for the Armistice and the ideological basis for US internationalism.

League of Nations

The international organization proposed in 1919; central to Wilson’s vision, but it became the primary target for domestic political opposition.

Isolationists’ views of Article X

Opposition to the League of Nations' collective security provision (1919); feared it would force the US into foreign conflicts without Congressional consent.

Reservationists’ views of Article X

Led by Henry Cabot Lodge; they demanded specific amendments to protect US sovereignty before agreeing to the Treaty of Versailles.

Irreconcilables / Senator Lodge

Hardline opponents who rejected the 1919 Treaty of Versailles; their refusal led to the Senate's final rejection, cementing a return to isolationism.

Impact of Senate’s rejection of treaty

The 1920 Senate vote resulted in the US not joining the League, ending Wilson’s internationalist vision and starting a period of isolationist foreign policy.

US foreign policy after the Treaty of Versailles

The 1920s shift toward "independent internationalism"; prioritized economic dominance and bilateral agreements while avoiding political commitments.

Washington Treaty

The 1922 naval limitation pact; intended to manage instability in the Pacific and prevent a naval arms race through diplomatic cooperation.

Dawes Plan

The 1924 economic program; provided US loans to stabilize the German economy and ensure the flow of European war debt repayments.