Editing History of the United States (section)

===World War I and the interwar years===
{{Main|History of the United States (1917–1945)}}
{{see also|American entry into World War I|United States home front during World War I|United States in World War I|Roaring Twenties}}
[[File:Cimetière américain de Romagne-sous-Montfaucon - 1918 - France.JPG|thumb|[[Meuse-Argonne American Cemetery]] in [[France]], a cemetery for [[United States Armed Forces|U.S. servicemen]] killed in [[Europe]] during their service in [[World War I]]]]
As [[World War I]] raged in Europe from 1914, President [[Woodrow Wilson]] declared neutrality, but warned Germany that resumption of [[unrestricted submarine warfare]] against American ships would mean war. Germany decided to take the risk, and try to win by cutting off supplies to Britain through the sinking of ships such as the [[Sinking of the RMS Lusitania|RMS ''Lusitania'']]. The U.S. [[United States declaration of war on Germany (1917)|declared war]] in April 1917.<ref>{{Cite encyclopedia |title=Germany's Decision for Unrestricted Submarine Warfare and Its Impact on the U.S. Declaration of War |encyclopedia=World War I: Encyclopedia |publisher=ABC-CLIO |url=https://books.google.com/books?id=2YqjfHLyyj8C&pg=PA482 |access-date=June 27, 2015 |last=McNabb |first=James B. |year=2005 |editor-last=Roberts |editor-first=Priscilla Mary |pages=482–483 |isbn=9781851094202 |archive-url=https://web.archive.org/web/20151007155500/https://books.google.com/books?id=2YqjfHLyyj8C&pg=PA482 |archive-date=October 7, 2015 |editor-first2=Spencer |editor-last2=Tucker |url-status=live}}</ref>

By the summer of 1918 soldiers in General [[John J. Pershing]]'s [[American Expeditionary Forces]] arrived at the rate of 10,000 a day, while Germany was unable to replace its losses.{{Sfn|Coffman}} Dissent against the war was suppressed by the [[Sedition Act of 1918]] and [[Espionage Act of 1917]]. Over 2,000 were imprisoned for speaking out against the war.<ref name=":4">{{Cite journal |date=March 1, 1996 |title=American Political Prisoners: Prosecutions under the Espionage and Sedition Acts. By Stephen M. Kohn. (Westport: Praeger, 1994. xviii, {{ISBN|0-275-94415-8}}.) |journal=Journal of American History |volume=82 |issue=4 |page=1688 |doi=10.1093/jahist/82.4.1688-a |issn=0021-8723}}</ref>

The [[Allies of World War I|Allies]] won in November 1918. Wilson dominated the [[1919 Paris Peace Conference]], putting his geopolitical hopes in the new [[League of Nations]] as Germany was treated harshly in the [[Treaty of Versailles]] (1919). Wilson refused to compromise with Senate Republicans over the issue of Congressional power to declare war, and the Senate rejected the Treaty and the League.{{Sfn|Cooper}} Instead, the United States chose to pursue [[unilateralism]].<ref>{{Cite news |date=April 29, 1991 |title=Feature: World War I and isolationism, 1913–33 |publisher=U.S. Department of State |url=http://findarticles.com/p/articles/mi_m1584/is_n17_v2/ai_11173912 |url-status=dead |archive-url=https://web.archive.org/web/20090102113850/http://findarticles.com/p/articles/mi_m1584/is_n17_v2/ai_11173912 |archive-date=January 2, 2009}}</ref> The aftershock of Russia's [[October Revolution]] resulted in fears of Communism in the United States, leading to a [[First Red Scare|Red Scare]] and the deportation of non-citizens considered subversive.

Despite the Progressive-era modernization of hospitals and medical schools,<ref>{{Cite book |last=Carlisle |first=Rodney P. |url=https://books.google.com/books?id=dYwn0je9MfYC&pg=PT245 |title=Handbook to Life in America |year=2009 |publisher=Infobase Publishing |isbn=9781438119014 |page=245ff |access-date=June 27, 2015 |archive-url=https://web.archive.org/web/20151016105918/https://books.google.com/books?id=dYwn0je9MfYC&pg=PT245 |archive-date=October 16, 2015 |url-status=live}}</ref> the country lost around 550,000 lives to the [[Spanish flu]] pandemic in 1918 and 1919.<ref>{{Cite web |url=https://www.cdc.gov/flu/pandemic-resources/1918-commemoration/1918-pandemic-history.htm |title=History of 1918 Flu Pandemic |website=CDC |date=January 22, 2019}}</ref><ref>{{Cite web |date=April 15, 2024 |title=Influenza pandemic of 1918–19 - Cause, Origin, & Spread |url=https://www.britannica.com/event/influenza-pandemic-of-1918-1919 |access-date=2024-06-09 |website=Britannica.com |language=en}}</ref> During the "[[Roaring Twenties|Roaring]]" 1920s, the economy expanded. African-Americans benefited from the [[Great Migration (African American)|Great Migration]] and had more cultural power, an example being the [[Harlem Renaissance]] which spread [[jazz]] music. Meanwhile, the [[Ku Klux Klan]] had a resurgence, and the [[Immigration Act of 1924]] was passed to strictly limit the number of new entries.<ref>{{Cite web |title=Roaring Twenties - Definition, Music, History, & Facts |url=https://www.britannica.com/topic/Roaring-Twenties |access-date=2024-06-09 |website=Britannica.com |language=en}}</ref>

[[Prohibition in the United States|Prohibition]] began in 1920, when the manufacture, sale, import and export of alcohol were prohibited by the [[Eighteenth Amendment to the United States Constitution|Eighteenth Amendment]]. [[Rum-running|Bootlegged alcohol]] in the cities ended up under the control of gangs, who fought each other for territory. Italian bootleggers in New York City gradually formed the [[American Mafia|Mafia]] crime syndicate. In 1933, President [[Franklin D. Roosevelt]] [[Cullen-Harrison Act|repealed prohibition]].<ref>{{Cite web |date=April 10, 2024 |title=Prohibition - Definition, History, Eighteenth Amendment, & Repeal |url=https://www.britannica.com/event/Prohibition-United-States-history-1920-1933 |access-date=2024-06-09 |website=Britannica.com |language=en}}</ref>