2015 National Military Strategy: Background and Questions for Congress [July 29, 2015] [open pdf - 121KB]
"In June 2015, the Chairman of the Joint Chiefs of Staff issued the most recent United States National Military Strategy (NMS). This NMS argues that 'revisionist states' seeking to change the existing international order (such as Russia) and non-state actors (such as the Islamic State) are creating a strategic context whereby 'global disorder has significantly increased, while some of our comparative military advantage has begun to erode.' Of note, the NMS states--for the first time in a major strategy document produced in the past 20 years--that there is a distinct possibility that the United States may find itself at war with another great power, although it notes that the probability of that actually happening is 'low but growing.'"
CRS Insight, IN10333