"During the final months of World War II, Japan planned to use plague as a biological weapon against San Diego, California. The plan was scheduled to launch on

"During the final months of World War II, Japan planned to use plague as a biological weapon against San Diego, California. The plan was scheduled to launch on September 22, 1945, but Japan surrendered five weeks earlier." https://en.wikipedia.org/wiki/Unit_731#Biological_warfare https://en.wikipedia.org/wiki/Unit_731#Biological_warfare