Basically, as the title says, in the modern era without Sanhedrin, does a Jewish army require permission from the rabbonim of the times to wage war? If they do, would the current conflict in Israel be considered a milchemes mitzvah and therefore not require approval?

  • I remember seeing that when there is no king then the leader gives permission, I have to check up the Rambam again
    – sam
    Commented Jan 3 at 0:07
  • Consider Judges 20:23, 20:28 (among others)
    – Double AA
    Commented Jan 3 at 1:36
  • 1
    Who would you consider "Rabbonim?" We have no Sanhedrin, so you'd ask random rabbonim and roshei yeshivos? Who gave them the authority to declare war?
    – ElonMusk
    Commented Jan 3 at 1:49
  • Welcome to MiYodeya and thanks for this first question. Great to have you learn with us!
    – mbloch
    Commented Jan 3 at 4:08

1 Answer 1


As a defensive war is labeled as a milchemes mitzvah and doesn't require consultation with the Sanhedrin you're good to go

Excerpted from Mishneh Torah hilchos melachim 5:1

וְאֵי זוֹ הִיא מִלְחֶמֶת מִצְוָה זוֹ מִלְחֶמֶת שִׁבְעָה עֲמָמִים. וּמִלְחֶמֶת עֲמָלֵק. וְעֶזְרַת יִשְׂרָאֵל מִיַּד צָר שֶׁבָּא עֲלֵיהֶם.

What is considered as milchemet mitzvah? The war against the seven nations who occupied Eretz Yisrael, the war against Amalek, and a war fought to assist Israel from an enemy which attacks them.

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