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What do the contemporary poskim say about the serving in the IDF? Do they consider it a Biblical commandment (mitzva de'orayta) if one chooses to serve?

I am obviously not talking about the controversial draft. But if a Jew by his own volition wanted to serve in the IDF does he fulfill a Mitzvah DeAroaita. I've heard certain mitzvot like Protecting the Land, or Pikuach Nefesh are cited, but I wanted to know if anyone has any sources from contemporary poskim.


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i saw a tshuva from r moshe once in choshen mishpat, he mentions that one needs the urim vtumim to go to war, for without it, it would be assur to put yourself b'makom sakana – user5535 Jun 11 '14 at 11:55
@TropicanaYid But the urim vtumim weren't available for questions during the Second Temple. Were the Maccabees wrong for fighting the Greeks? – Double AA Jun 11 '14 at 13:19
@Tropicana yid , Its Igros Moshe CM 2:78 ,see also OC 4:75 at end – sam Jun 12 '14 at 1:33
I would also suggest one read his Hilchos Medina – sam Jun 12 '14 at 1:54
1 just published an article on this today, but many already exist (some positive views from Rav Schachter and Rav Zevin though for different reasons) – Matt Jun 23 '14 at 5:27

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