Indicators of Just War in Amir al-Mu'minin's (a.s.) Sire Military

The just war is one of issues that Is discussed in the ethics of war and Looking for to limit the scope of war and the resulting destructive consequences. This issue has been neglected in Islamic thought .In this research Indicators of just war has been extracted with focuses on the wars of Amir al-Mu'minin. This research examines just war on two areas of the right to war and Act of war, The Battle of the Jamal, Siffin and Nahrawan have been studied. The achievement of this research can be divided into two main sections. The first part is the extraction of key questions of just war in conventional theories, and the second part is answering it from Amir al-Mu'minin's (a.s.) Sire Military .first section, Include this questions: By whom? (Authority), why? (Fair Cause), when? (Necessity), with what purpose? (Right Intent), and how? (Fair Behavior). In the second part, the answers to previous questions is extracted from Amir al-Mu'minin's (a.s.) Sire.