What events led up to the attack on Pearl Harbor?

The main
events that led to the Japanese attack on Pearl Harbor were actions that Japan took in pursuit
of an empire in Asia and the Pacific.  Added to this was the United States reaction to Japans
actions.  The combination of Japanese actions and US reaction led to the attack.

In the time after WWI, Japan wanted to expand its empire in its general region of the
world.  It wanted to be a major power with a large empire just...