Expecting war, and seeing an opportunity in the forward basing of the U.S. Pacific Fleet in Hawaii, the Japanese began planning in early 1941 for an attack on Pearl Harbor. First, the Pacific Fleet was a formidable force, and would not be easy to defeat or to surprise.
The stock market cash led many people to withdraw their deposits/take out loans from the banks. And because people could not pay the banks back for this, it ultimately lead to banks not having enough money to function.
