World War I
Background
Basic Causes
Imperialism
The European Alliance System
Immediate Causes of War
The Early War
US Neutrality
The Sinking of the Lusitania
Unrestricted Submarine Warfare
The Zimmerman Note
The US Enters the War
Mobilization
The War Industries Board
The Sedition Act
Wilson's 14 Points
The Treaty of Versailles
US Reaction to Versailles