Soldiers are a sacrifice they are willing to make to prove that point, particularly as war becomes less about the soldiers and more about the equipment the soldiers operate. Actually let me take that back, war has always been about the equipment that soldiers operate, from spears to guns, from trebuchets to tanks, and from ballistae to ICBMs.
The soldiers serve two important roles here: 1. to operate the piece of equipment they are charged with effectively to accomplish their roles within a mission environment and 2. to occupy a piece of dirt with their continued, loyal and obedient, presence until their CO tells them to move along to the next piece of dirt down the road.
Until war is obsolete, so until life comes to an end on Earth basically, there are going to continue to be people eagerly awaiting the next battlefield to prove their points.
IMO it's pretty fucked up to be eagerly awaiting killing of others, regardless of reason. It may, in this world, be deemed "necessary" by politicians and generals etc, but to derive pleasure and eagerly wish for it to happen really doesn't sit at all well with me.