This article discusses a particular point of the definition of a military objective. The questions are whether it is possible to draw up an uncontroversial list of “military objectives by nature” and which items such a list might include. One important issue is whether the category “military objectives by nature” is absolute - in other words whether they must qualify as such at all times. Some think that this is the case, while others are of the opinion that the military advantage test must be met also by those objects that are military objectives by nature. In this paper, an attempt is made to show that although the category “military objectives by nature” may not be absolute, there are certain objects which, by their nature, will make an effective contribution to military action in all practical circumstances and that a list of such objects goes beyond weapons and other typical military items.