Answer:
There are 3 main factors that led to the US joining World War 1.
1. The Zimmerman Note
2. The sinking of the Lusitania
3. Unrestricted submarine warfare
The Zimmerman Note angered Americans because it was Germany, going behind the US's back asking for Mexico's help- saying that if they started a war with the US, then Germany would help it repossess some territory. If America was focused on a war against Mexico, it most likely wouldn't have joined WW1, or would've been as powerful.
The Lusitania was a British passenger ship that had Americans on it. Germans sunk it, and the people on board died. Germany claimed that it had contained munitions, but Britain denied it- only much later did people prove that there were actually weapons/supplies. Either way, whenever Americans die, Americans get mad.
Unrestricted submarine warfare is mainly just an immoral practice- sinking any ship in sight, without stopping it and confirming civilians.
I hope this helped!
Answer: The sinking of the Lusitania, their loans to the Allies, and the Zimmerman telegram.
Explanation: The three main factors that pushed the U.S. to enter WW1 were the sinking of the Lusitania, their loans to the Allies, and the Zimmerman telegram. The sinking of the Lusitania occured when a German U-boat sunk the British passenger ship the Lusitania, killing 128 Americans and angering the United States. The U.S. economy was booming due to the war, and banks had given many large loans to the Allied Powers, which effectively invesed the U.S. in the Allies' success. The last straw was the Zimmerman telegram from the Germans to the Mexican government promising them the land they had lost in the Mexican-American war if they attacked the U.S. All of this pushed the United States to enter WW1.
