War killing requires willingness to share risk. [fact]
But what is not permissible, it seems to me, is what NATO did in the Kosovo war, where its leaders declared in advance that they would not send ground forces into battle, whatever happened." Then he drives the point home: "This is not a possible moral position. You can't kill unless you are prepared to die." The right to kill in this war thus seems in principle to depend upon a willingness to expose the lives of one's own soldiers, or at least not a priori excluding that possibility.
Grégoire Chamayou, A Theory of the Drone, loc. 501