<div>Regarding the questions posed, I think one way of clearing things up is to properly define the situation.</div>
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<div>If truly the situation is "when one is a soldier at war", then all necessary activites from active fighting, to patrolling to training for an operation to preparing supplies for such and their transport, all should fall into the permitted domain (at least that has been my experience both during the first Lebanon War and subsequent regular reserve duty as well as special duty during Operation Storm here in Hebron).
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<div>So, when you ask "The question that bothers me is what about in training? There must be a point where one should not do things during training on shabbos because the environment is not truly a sakkanah" I need ask: at what time is this training taking place? There is a difference when done during war but not on or near an actual battlefield or whether far away from any field of operations which, I would presume, that it should not be done on the Shabbat.
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<div>Since I feel that you are talking about actual wartime, in a Jewish army like in Israel, obviously there would be a dialogue between the "chaplain" and the relevant officers to judge what is really necessary to be done even on the Shabbat to keep troops ready or prepared for an immediate operation. In my experience up near Tzur in 1985, we carried weapons constantly, day/night. Shabbat/chol/, bathroom/kitchen, even when not "on duty" although turning lights off/on, storeroom duty and other related activities were not done on the Shabbat except for the specific units who went out on patrol.
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<div>Once you get into it, it becomes easy to understand and follow.</div>
<div><br>-- <br>Yisrael Medad<br>Shiloh<br>Mobile Post Efraim 44830<br>Israel </div>