The presence of ancient myths and mythical concepts and personages of Shahnameh, in the war poem can't be accidental. But; Shahnameh is an ancient pattern for heroic verse; so in the appropriate time, like during the period of "imposed war against Iran", the unconscious collective of poets of war poem helped them to use these kind of patterns, this, testifies the influence of Shahname on war poems in modern time in Iran. Defining the importance of Shahnameh, in the aspect of "NATIONAL UNITY", especially in the period of "imposed war"; is the first aim of this research. And revealing the honors of Iranian warriors to maintain the integrity and elegance of Iran is the next purpose of this paper. Also, defining other features of Epic and War poem; and other similarities and differences between them are the basic discussion in this research.