With R. Shvat: Am Yisrael, Eretz Yisrael & Medinat Yisrael
Dealing
with the rabbinic sources most often cited by the haredim to exempt yeshiva boys from the Israeli army, which prove to be very tenuous and unsubstantiated in present times, because all of the wars of Tzahal are clearly milchamot mitzvah (self-defense) and accordingly all men are obligated to help when Am Yisrael is in danger.