The interception of the Zimmerman telegram and German disregard for the Sussex Pledge.
Answer:
poison gases
warplanes
tanks
Explanation:
the gases would dissolve their insides they would cough so much their lungs would break down from the gas poison.
warplanes would drop bombs to kill the allis or axis groups.
tanks would shoot things for a farther distances to kill the people.
The Independence Hall is where it was written, and is still up and has artifacts from then today
B. What countries in Europe exist today that did not exist 100 years ago
