The United States' entry into World War I was influenced... Show more
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7
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J
Jomari Yancey
7/20/2025
AP US History
World War I Notes
140
•
Jul 20, 2025
•
Why the US Joined World War I and What Happened After
J
Jomari Yancey
@jomariyancey_tifo
World War I Alliances and US Involvement
This page delves deeper into the composition of the Allied and Central Powers, and explores the reasons for US involvement in World War I.
The Allied Powers, also known as the Entente Powers, included:
- Great Britain
- France
- Serbia
- United States
- Russia
- Belgium
The Central Powers consisted of:
- Germany
- Austro-Hungarian Empire
- Ottoman Empire
- Bulgaria
Highlight: The causes of US involvement in World War I were multifaceted and complex.
The main reasons for US entry into the war were:
- Inability to remain neutral due to close ties with Great Britain
- German submarine warfare, particularly the sinking of the Lusitania
- The Zimmerman Telegram, a diplomatic incident that raised tensions
- Strong economic and political ties to Great Britain
Definition: The Zimmerman Telegram was a secret diplomatic communication proposing a military alliance between Germany and Mexico, intercepted by British intelligence.
This page effectively illustrates how international alliances and specific incidents contributed to drawing the United States into the global conflict.
The Great War: Causes, US Involvement, and Aftermath
This page provides a comprehensive overview of World War I, including its causes, the reasons for US involvement, new fighting methods, and the war's conclusion.
The causes of World War I, often remembered by the acronym MAIN, were:
- Militarism
- Alliances
- Nationalism
- Imperialism
- Assassination
Highlight: These factors collectively contributed to the impact of militarism and alliances in WWI, creating a volatile international situation.
The reasons for US involvement, as mentioned earlier, included:
- Inability to remain neutral
- German submarine warfare
- Economic and political ties to Great Britain
- The Zimmermann Telegram
The war introduced new methods of fighting, including:
- Airplanes
- Trench warfare
- Poison gas
- Tanks
Example: Trench warfare became a symbol of the war's brutality, with soldiers enduring harsh conditions in long, fortified ditches.
As the war concluded, US President Woodrow Wilson proposed the Fourteen Points, a peace plan that included the formation of the League of Nations.
Quote: "The United States Senate did not ratify the Treaty of Versailles because of a desire to resume pre-war isolationism."
This decision marked the beginning of a period of US isolationism, as the country chose not to join the League of Nations, significantly impacting international relations in the interwar period.
World War I Key Concepts and Alliances
This page introduces essential vocabulary and concepts related to World War I, focusing on the major alliances and key terms crucial for understanding the conflict.
Vocabulary: Alliances are pacts or treaties that promise financial or military support between nations.
The two main coalitions in World War I were:
- Allied Powers: Included Great Britain, France, Serbia, Belgium, USA, and Russia .
- Central Powers: Comprised Germany, Austria-Hungary, Bulgaria, and the Ottoman Empire .
Highlight: The formation of these alliances played a significant role in the escalation of the conflict, demonstrating the impact of militarism and alliances in WWI.
Other important terms defined include:
- Neutral: Not choosing sides in a dispute or war
- Armistice: An agreement to stop fighting, allowing time for peace negotiations
- Reparations: Financial penalties paid by defeated nations to victorious ones
- Isolationism: A belief in avoiding political and military involvement with other countries
Example: The sinking of the Lusitania, a passenger ship bombed by Germany in 1915, was a pivotal event that contributed to the US entering the war.
The page also mentions U-boats and militarism, highlighting the technological and ideological aspects of the war.
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The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
Why the US Joined World War I and What Happened After
J
Jomari Yancey
@jomariyancey_tifo
The United States' entry into World War I was influenced by various factors, including causes of US involvement in World War Isuch as German submarine warfare and economic ties with Britain. The war saw new fighting methods and ended... Show more
World War I Alliances and US Involvement
This page delves deeper into the composition of the Allied and Central Powers, and explores the reasons for US involvement in World War I.
The Allied Powers, also known as the Entente Powers, included:
- Great Britain
- France
- Serbia
- United States
- Russia
- Belgium
The Central Powers consisted of:
- Germany
- Austro-Hungarian Empire
- Ottoman Empire
- Bulgaria
Highlight: The causes of US involvement in World War I were multifaceted and complex.
The main reasons for US entry into the war were:
- Inability to remain neutral due to close ties with Great Britain
- German submarine warfare, particularly the sinking of the Lusitania
- The Zimmerman Telegram, a diplomatic incident that raised tensions
- Strong economic and political ties to Great Britain
Definition: The Zimmerman Telegram was a secret diplomatic communication proposing a military alliance between Germany and Mexico, intercepted by British intelligence.
This page effectively illustrates how international alliances and specific incidents contributed to drawing the United States into the global conflict.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
The Great War: Causes, US Involvement, and Aftermath
This page provides a comprehensive overview of World War I, including its causes, the reasons for US involvement, new fighting methods, and the war's conclusion.
The causes of World War I, often remembered by the acronym MAIN, were:
- Militarism
- Alliances
- Nationalism
- Imperialism
- Assassination
Highlight: These factors collectively contributed to the impact of militarism and alliances in WWI, creating a volatile international situation.
The reasons for US involvement, as mentioned earlier, included:
- Inability to remain neutral
- German submarine warfare
- Economic and political ties to Great Britain
- The Zimmermann Telegram
The war introduced new methods of fighting, including:
- Airplanes
- Trench warfare
- Poison gas
- Tanks
Example: Trench warfare became a symbol of the war's brutality, with soldiers enduring harsh conditions in long, fortified ditches.
As the war concluded, US President Woodrow Wilson proposed the Fourteen Points, a peace plan that included the formation of the League of Nations.
Quote: "The United States Senate did not ratify the Treaty of Versailles because of a desire to resume pre-war isolationism."
This decision marked the beginning of a period of US isolationism, as the country chose not to join the League of Nations, significantly impacting international relations in the interwar period.
World War I Key Concepts and Alliances
This page introduces essential vocabulary and concepts related to World War I, focusing on the major alliances and key terms crucial for understanding the conflict.
Vocabulary: Alliances are pacts or treaties that promise financial or military support between nations.
The two main coalitions in World War I were:
- Allied Powers: Included Great Britain, France, Serbia, Belgium, USA, and Russia .
- Central Powers: Comprised Germany, Austria-Hungary, Bulgaria, and the Ottoman Empire .
Highlight: The formation of these alliances played a significant role in the escalation of the conflict, demonstrating the impact of militarism and alliances in WWI.
Other important terms defined include:
- Neutral: Not choosing sides in a dispute or war
- Armistice: An agreement to stop fighting, allowing time for peace negotiations
- Reparations: Financial penalties paid by defeated nations to victorious ones
- Isolationism: A belief in avoiding political and military involvement with other countries
Example: The sinking of the Lusitania, a passenger ship bombed by Germany in 1915, was a pivotal event that contributed to the US entering the war.
The page also mentions U-boats and militarism, highlighting the technological and ideological aspects of the war.
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
Where can I download the Knowunity app?
You can download the app in the Google Play Store and in the Apple App Store.
Is Knowunity really free of charge?
You have the choice, we offer a 100% secure payment via PayPal or an Amazon gift card. There is no limit to how much you can earn.
Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.9/5
App Store
4.8/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user