power and deterrence. Deterrence relies on the  threat or use of substantial force, whereas the  

balance of power relies on strategic, flexible  alliances. In this example, both are in evidence.

The United States, Russia, and France  — rely on a variety of fair-weather  

alliances with regional powers like  Saudi Arabia, Turkey, and Iran. And,  

deterring the enemy with overwhelming,  superior force or the prospect of doing  

so was seen as the quickest way to reclaim  control of Islamic State-controlled territory.

On the other hand, from a realistic standpoint,  the Islamic State organization is utilizing the  

few resources at its disposal to offset Western  influence in Iraq and Syria by spreading terror.