War is one of the most sophisticated social phenomena which can leave a huge impact on different communities. This impact is so huge that it can affect all systems and subsystems and social institutions. Therefore, a war is a group fighting whose main characteristic is having a special discipline and organization. On the other hand, identity has an intricate and highly sophisticated concept in social sciences. Though it is an old issue, it has remained a continuing debate open to change and redefinition. The current research, in addition to studying the Parson's pattern and also the biological, biographical, social as well as cultural subsystems will also analyze the Iran-Iraq war from a sociological perspective. Through this it aims at establishing the relation between identity and war and the fact that during a war identity in general and national identity in particular are enhanced. This process can eventually encourage the people of a country to defend their homeland against its enemies.