Emergence of the Americas in global affairs (1880–1929)

That great nations need a strong navy, overseas coaling stations, and colonies to project sea power — argued in *The Influence of Sea Power upon History* (1890).

Political, economic, social, and ideological reasons.

The explosion of the USS Maine in Havana harbour, blamed on Spain by the American 'yellow press'.

Sensationalist, exaggerated news reporting (used by Pulitzer and Hearst) designed to provoke strong public reaction, e.g. over Cuba.

Puerto Rico, Guam, and the Philippines (bought for $20 million); Cuba became nominally independent.

A condition forced on Cuba's constitution allowing the US to intervene militarily in Cuba and lease Guantánamo Bay — limiting Cuba's real independence.

An addition to the Monroe Doctrine claiming the US had the right to intervene in Latin American nations' affairs to keep European powers out and maintain stability.

Big Stick (Roosevelt) = force first; Dollar Diplomacy (Taft) = investment/money first; Moral Diplomacy (Wilson) = claimed principle first — but all three still intervened militarily and secured US dominance.

Roosevelt supported a Panamanian revolt against Colombia (which had refused a canal treaty), then quickly recognised the new Panama and secured canal rights; completed 1914.

It claimed the US would only support just, democratic governments and reject force — but Wilson still occupied Haiti (1915) and sent troops into Mexico (1916 Pershing Expedition against Pancho Villa).

A group (including Mark Twain) who argued that US overseas rule without consent betrayed America's own founding ideals of liberty and self-government.

It marked the US's transition from a continental power to an overseas imperial power, gaining its first colonies (Puerto Rico, Guam, Philippines) and control over Cuba.

The Zimmermann Telegram — Germany's secret offer to Mexico of Texas, New Mexico and Arizona if Mexico joined Germany against the US — combined with resumed unrestricted submarine warfare.

A German policy of sinking any ship (including neutral and passenger vessels) near Britain without warning, to starve Britain of supplies.

1) Unrestricted submarine warfare sinking US ships and killing US citizens (e.g. Lusitania, 1915); 2) the Zimmermann Telegram threatening US territory; 3) economic ties — huge loans and trade with the Allies that a German victory would wipe out.

Wilson's January 1918 peace programme: open diplomacy, freedom of the seas, free trade, arms reduction, national self-determination, and a League of Nations to keep future peace.

Senator Henry Cabot Lodge and other 'Irreconcilables'/reservationists feared Article 10 (the League of Nations collective security clause) would drag the US into future European wars without Congress's consent, threatening US sovereignty over declaring war.

In 1919, while touring the country to build public support for the treaty, Wilson suffered a severe stroke that left him partially paralysed and unable to lead an effective compromise with the Senate.

The US never joined the League of Nations and signed a separate peace with Germany in 1921 — undercutting the very organisation Wilson had designed to enforce the peace.

The US emerged as the world's leading creditor nation (Britain and France now owed the US billions), overtook Europe as the dominant economic and naval power in the Americas, and cemented its role as the unrivalled hegemon of the Western Hemisphere.

Canada: fought as part of the British Empire from 1914, suffered ~60,000 dead, introduced conscription (1917) which split English and French Canadians, and gained more independent international standing (separate seat at Paris Peace Conference). Brazil: joined the Allies in 1917 after German U-boats sank Brazilian ships, sent a small naval squadron and medical mission — limited military role but symbolic Allied solidarity.

Rapid industrial growth from war production (munitions, wheat exports), rising national debt, high inflation, and the introduction of income tax (1917) as a 'temporary' wartime measure.

Expanded roles for women in factories and support of the suffrage movement (leading to the 19th Amendment, 1920); the Great Migration of African Americans to northern industrial cities; and a wave of anti-German and anti-radical sentiment (e.g. the 1919–20 Red Scare).

State the question's judgement upfront (thesis) → 3–4 paragraphs each opening with a clear analytical point, backed by specific evidence (names/dates), and closing by linking back to the question → a conclusion that directly answers the command term (e.g. 'to what extent').