--- title: WWI Anniversary: America in World War I, in 1 Minute description: Why did the U.S. enter World War I on April 6, 1917? The answer is complicated, but here's what you need to know, in just a minute. canonical: https://time.com/4717078/america-wwi-history-video/ author: Kenneth Bachor article:opinion: false article:content_tier: free article:published_time: 2017-04-05T16:00:55.000Z article:modified_time: 2026-03-30T12:22:13.240Z article:section: History og:title: WWI Anniversary: America in World War I, in 1 Minute og:description: War was declared on April 6, 1917 og:url: https://time.com/4717078/america-wwi-history-video/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/bltbd7c44363fd95e2a/6988c1484dd215de3befe63d/world-war-i-fb.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 og:image:width: 1735 og:image:height: 976 og:image:alt: world-war-i-fb og:type: article twitter:card: summary_large_image twitter:title: WWI Anniversary: America in World War I, in 1 Minute twitter:description: War was declared on April 6, 1917 twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/bltbd7c44363fd95e2a/6988c1484dd215de3befe63d/world-war-i-fb.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 ---  # Watch: Why the U.S. Entered World War I, in 1 Minute > Sponsored content. 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Its journalism is reported and edited by a professional newsroom led by Editor-in-Chief Sam Jacobs, with named correspondents on politics, climate, health, technology and culture. It reaches 1 million US print subscribers and 1.15 million globally, plus more than 1.1 million newsletter readers. #### How do I subscribe to TIME magazine? Subscriptions are at time.com/subscribe-agent. Choose digital only at $20 a year, or print and digital from $29 a year or $49 for two years. TIME also publishes seven free email newsletters at time.com/newsletters, which do not require a subscription. #### Can I cancel a TIME subscription? Yes. TIME states that subscriptions can be cancelled at any time. #### Does TIME have free newsletters? Yes. TIME publishes seven free email newsletters reaching more than 1.1 million readers, covering daily news, Washington politics, health, AI, climate and energy, culture, and the newsroom itself. They are at time.com/newsletters and are separate from a paid subscription. by [Kenneth Bachor](https://time.com/author/kenneth-bachor/), [Liz Ronk](https://time.com/author/liz-ronk/) and [Lily Rothman](https://time.com/author/lily-rothman/) Apr 5, 2017 4:00 PM UTC  Getty Images by [Kenneth Bachor](https://time.com/author/kenneth-bachor/), [Liz Ronk](https://time.com/author/liz-ronk/) and [Lily Rothman](https://time.com/author/lily-rothman/) Apr 5, 2017 4:00 PM UTC It was precisely [100 years ago this week](http://time.com/4105085/veterans-day-world-war-i-memorial/) that the U.S. made a decision that would alter the course of history for the nation and the world. On April 2, 1917, President Woodrow Wilson [asked Congress ](http://www.presidency.ucsb.edu/ws/index.php?pid=65366)for a declaration of war against Germany, explaining that that nation’s unrestricted [submarine warfare](http://time.com/3840371/lusitania-100-years/) constituted “a warfare against mankind” and that the U.S. policy of “armed neutrality” in the conflict that had been sweeping across Europe was no longer working. “With a profound sense of the solemn and even tragical character of the step I am taking and of the grave responsibilities which it involves, but in unhesitating obedience to what I deem my constitutional duty,” he said, “I advise that the Congress declare the recent course of the Imperial German Government to be in fact nothing less than war against the government and people of the United States; that it formally accept the status of belligerent which has thus been thrust upon it, and that it take immediate steps not only to put the country in a more thorough state of defense but also to exert all its power and employ all its resources to bring the Government of the German Empire to terms and end the war.” Within days, Congress passed the resolution that Wilson had requested. On April 6 of that year, a century ago this Thursday, the U.S. [declared](http://www.presidency.ucsb.edu/ws/index.php?pid=598) war on Germany and thus officially entered into the conflict that would come to be known as World War I. But it was a long journey there for a President who had campaigned on the slogan “He kept us out of war.” Here are the basics of what changed, in one minute. ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/4717078/america-wwi-history-video/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/4717078/america-wwi-history-video/"},"headline":"Watch: Why the U.S. Entered World War I, in 1 Minute","datePublished":"2017-04-05T16:00:55.000Z","dateModified":"2026-03-30T12:22:13.240Z","description":"War was declared on April 6, 1917","url":"https://time.com/4717078/america-wwi-history-video/","keywords":["conflict"],"thumbnailUrl":"https://static.time.com/v3/assets/bltea6093859af6183b/bltbd7c44363fd95e2a/6988c1484dd215de3befe63d/world-war-i-fb.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","author":[{"@type":"Person","name":"Kenneth Bachor","jobTitle":null,"url":"https://time.com/author/kenneth-bachor/"},{"@type":"Person","name":"Liz Ronk","jobTitle":null,"url":"https://time.com/author/liz-ronk/"},{"@type":"Person","name":"Lily Rothman","jobTitle":"Rothman is managing editor at TIME.","url":"https://time.com/author/lily-rothman/"}],"articleSection":"History","image":[{"@type":"ImageObject","url":"https://static.time.com/v3/assets/bltea6093859af6183b/bltbd7c44363fd95e2a/6988c1484dd215de3befe63d/world-war-i-fb.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","width":1200,"height":675,"headline":"world-war-i-fb","caption":"world-war-i-fb","creditText":"Getty Images","representativeOfPage":true}],"publisher":{"@type":"Organization","name":"Time","url":"https://time.com/","logo":{"@type":"ImageObject","url":"https://time.com/images/logo.png","width":528,"height":156},"foundingDate":"March 3, 1923","sameAs":["https://www.facebook.com/time","https://www.instagram.com/time/?hl=en","https://twitter.com/time","https://www.pinterest.com/timemagazine"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/section/history/","name":"History"}},{"@type":"ListItem","position":2,"item":{"@id":"/tag/conflict/","name":"conflict"}},{"@type":"ListItem","position":3,"item":{"@id":"https://time.com/4717078/america-wwi-history-video/","name":"Watch: Why the U.S. Entered World War I, in 1 Minute"}}]}] ```