Final answer:
The actions that led up to World War II in chronological order were Germany's reconstruction of its military arsenal, Hitler becoming the chancellor of Germany, Germany sending troops to the demilitarized Rhineland, Germany forming the Axis alliance with Italy and Japan, and the start of World War II with Germany's invasion of Poland.
Step-by-step explanation:
The actions that led up to World War II can be put in chronological order as follows:
- Germany begins reconstructing its military arsenal in violation of the Versailles Treaty.
- Hitler becomes the chancellor of Germany.
- Germany sends troops to the demilitarized Rhineland in violation of the Versailles Treaty.
- Germany, Italy, and Japan form the "Axis" alliance.
- World War II begins after Germany invades Poland.