A peace or treaty based on justice and fair play is one of the moral deeds and/or one of the social orders of Islam. But if an agreement based on reality, a treaty wherein the interests of the two quarrelling parties are ensured in a correct manner, an agreement which is overseen by a group of faithful and God-fearing people is disturbed by one of the parties by overstepping the limits of justice, then it becomes incumbent for the Islamic society to oppose and condemn and fight such erring party until it submits to the commandment of Allah.
In this regard the Holy Quran says: And if two parties of the believers quarrel, make peace between them; but if one of them acts wrongfully towards the other, fight that which acts wrongfully until it returns to Allah's command; then if it returns, make peace between them with justice and act equitably; surely Allah loves those who act equitably.
And it is recorded from Amirul Momineen (a.s.) that the Holy Prophet (s.a.w.s.) had repeatedly asserted: A nation which does not take back the usurped rights of the weak frankly and clearly from the oppressors will never see success.
Amirul Momineen (a.s.) thus explains the reason of accepting the caliphate after a deprivation for twenty-five years: Beware! By God! Who tore the seed and Who created man, know that had the people not gathered around me so numerously and had they not got up in my favour and had the argument not been completed and had not God obtained a covenant and responsibility from the wise and the knowledgeable in every society that they should not remain meek spectators in from of the overeating of the oppressors and the hunger of the oppressed, I would have given up the reign of caliphate and would have overlooked it and I would have saturated them with the glass of its beginning and then you would have understood fully that your world with all its decoration has, in my eyes, less value than the water coming out of the nose of a sheep.
Imam Sadiq (a.s.) says: The one who continues to oppress and the one who assists him and/or who is pleased with his ways stand all in one line.
Exploring peace
Peace and tranquillity is described as one of the most precious Islamic values which, despite the above-mentioned conditions, is considered a great Islamic duty. It makes no difference whether the parties are Muslim or are two big states. In any case it is the duty of every Muslim individual to do his best of the establishment of peace and tranquillity.
Here it must be remembered that the peace proclaimed by the dishonest Saddam is no peace as he intends to renew his strength under pretext of peace and to restart invading our defenceless cities and to turn them into ruins. Otherwise the government of the Islamic state of Iran is ver-ready to made peace with justice and honour on the conditions mentioned above.
With regard to establishing peace between two warring parties Amirul Momineen Ali (a.s.) says: From the will of Ali (a.s.) to his sons Hasan and Husain (a.s.) after being hit fatally by the cursed Ibne Muljim: I advise you and all my sons in my family and to all those who this will reaches to be pious and to fear Allah. I recommend organising of your affairs and making peace among yourselves because I have heard your grandfather Muhammad (s.a.w.s.) saying: Making peace between Muslims is higher than prayer and fasting.
Imam Sadiq (a.s.) says to Mufaddal: When you see scuffle between our friends, use my money to make peace between them.
Imam Sadiq (a.s.) also said: A peacemaker is not a liar even if he for making peace between two parties speaks against the facts.