Can a Muslim fight in a non Muslim war, like the Afghanistan war or something? I do not know if this is permissible or not.

  • 6
    Welcome to Islam. Please elaborate what do you mean by "non-Muslim war" by editing the answer. Be specific and go through How to Ask. Feb 17, 2014 at 17:14
  • 1
    Probably, she means Jihad by Muslim war and a war in general that has nothing to do with religion by non-muslim war. So when a muslim fights a non-Muslim war, he is serving as a soldier and he has to do what he is commanded to, and as far as I know, serving as a soldier is not banned, in other words it is permissible
    – user2724
    Feb 18, 2014 at 7:14
  • 1
    Look up the wars of Fijar and the lessons the `ulama derived from them.
    – Ansari
    Feb 23, 2014 at 16:28
  • 1
    How can you upvote that question? It is not clear what the asker is asking. This should be downvoted and we should wait for an edit of the question.
    – user12680
    Jul 12, 2015 at 10:10

3 Answers 3


It is not permissible. Joining non-Muslims in war against Muslims is the clearest form of taking them as allies instead of the believers:

O you who have believed, do not take the disbelievers as allies instead of the believers. Do you wish to give Allah against yourselves a clear case?

4:144 https://legacy.quran.com/4/144

O you who have believed, do not take the Jews and the Christians as allies. They are [in fact] allies of one another. And whoever is an ally to them among you - then indeed, he is [one] of them. Indeed, Allah guides not the wrongdoing people.

5:51 https://legacy.quran.com/5/51

And in war you will take lives and properties of other Muslims which is forbidden:

O you who have believed, do not consume one another's wealth unjustly but only [in lawful] business by mutual consent. And do not kill yourselves [i.e. one another]. Indeed, Allah is to you ever Merciful. And whoever does that in aggression and injustice - then We will drive him into a Fire. And that, for Allah, is [always] easy.

4:29-30 https://legacy.quran.com/4/29-30

A Muslim is he from whose hand and tongue the Muslims are safe.


It is not permitted to even give charity or sell weapons to non-Muslims who fight against Muslims, giving them your entire self is far worse.

  • Salam and welcome to IslamSE the Q&A site about Islam. To learn more about our site and model consider taking the tour and checking our help center. As to your post it is nowhere said that you will fight Muslims except if you took the example literally. I have my doubts that this answers the question under certain conditions. For example the conquest of al-Andalus clearly shows that Muslims can fight in non-Muslim wars.
    – Medi1Saif
    Oct 22, 2018 at 6:04
  • The example is Afghanistan, which is clearly a Muslim country. I interpret question that he wanted to ask about this case, otherwise he would have given some other example.
    – Hyena
    Oct 22, 2018 at 6:16
  • I suggest you simply add a paragraph at the end saying that fighting in non-Muslim vs. non-Muslim war is not forbidden.
    – The Z
    Oct 22, 2018 at 20:14

It can be okay without any special problem in the case that there is no disadvantage for Islam. As you asked if a Muslim can fight in a non Muslim war or not, your answer perhaps depends on the religion of the country. In fact Islam doesn't allow Muslims to fight against other Muslims, just they can defend, not attack. Because Muslims should have unity, otherwise fighting will weak them. you gave the example of Afghanistan, so Afghanistan is an Islamic country, then it is not allowed to attack to Muslims.


It depends on benefit of Islamic Ummah. If it does not harm benefits of Islamic Ummah there is no problem. this is an Islamic State issue and scholars consider different conditions for it. For example if it is at time of a war for Muslims or else. anyway general law is that if it does not harm benefits of Islamic Ummah there is no problem to sell weapons or other services or products to a non-Muslim military.

Reference of Fatwa:


You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .