USA in WW1

Question 1

When did USA join WW1?

Answer 1

The USA entered the war on April 6, 1917, joining the Allied Powers

Question 2

1. Why did USA join WW1?

Answer 2

Unrestricted Submarine Warfare:
Germany’s U-boats (submarines) were sinking ships, including American ones.
The sinking of the Lusitania (1915)

Question 3

2. Why did USA join WW1?

Answer 3

Zimmermann Telegram:
A secret message from Germany to Mexico promising land (Texas, Arizona, New Mexico) if Mexico joined the war against the US.
Britain intercepted and shared it with the USA.

Question 4

3. Why did USA join WW1?

Answer 4

Economic Interests:
The USA had loaned billions to the Allies.
A victory for Germany could risk those investments.