Why the US Was Justified in Entering WWI

The events leading up to April of 1917 left the United States no choice but to enter the war against Germany. The United States had every intention to maintain its neutrality throughout the European conflict but Germany's actions pulled them into fighting. Germany's submarine warfare, threats to democracy, and contacts with Mexico threatened the security and honor of the United States and could not be tolerated.
The creation and deployment that Germany made of the submarines caused great havoc in the Atlantic Ocean. …