The Age of Lone Wolf Terrorism is becoming more common in the United States and are more frequently targeting uniformed police and military personnel.
They conclude that lone wolf terrorist attacks are becoming more common in the United States, and that casualty tolls, both of injuries and of deaths, has risen steadily over the decades since 1940, and risen sharply in the 2010s. They also show that in recent years lone wolves have more frequently targeted uniformed police and military personnel. 
