After the demise of the holy Prophet (PBUH), conquests and wars which led to the opening of the gates of Iran, Byzantine Empire and Africa challenged Muslim thinkers and scholars to ask questions such as whether these conquests were legitimate. If they were illegitimate, what would be the criterion for the enjoyment of Ahl al-Bayt from these results? And can one distinguish between the lack of legitimacy of an action and its outcome? In this paper, we concluded that given the conditionality of the legitimacy of the primary jihad in Shiite jurisprudence by the permission of the Imam (AS) or the special vice of the Imam and the lack of the condition mentioned in the conquests, these wars were not legitimate. However, Ahl al-Bayt have benefited from the results of the conquests. The criterion for such an enjoyment was either the spoils or was based on the rule of obligation refereeing to the share of close relatives from khums.