Board Thread:Questions and Answers/@comment-159.153.172.100-20140617091033/@comment-104.56.130.175-20160220055809

The Division isn't based on any book at all. It's based on Operation Dark Winter, which was a "senior-level bio-terrorist attack simulation" (quoted from Wikipedia) that simulated a smallpox attack on the United States to test our national emergency response inadequacies.