Your "Civilian" will almost certainly never have had to arrive home on a December evening and tell his pregnant wife that he is "off tomorrow" to the other side of the World to intervene in a dispute about "Land Rights" and he doesn't know when he will be back.
True in the literal sense but we too get posted to far flung locations to work for weeks on end with little choice if we want to keep our jobs. Its also a lot more common for the international sales person to have this done more often to them than the average member of the armed forces. Think 9 months of the year travelling - every year - not just when there is a flap on. Debatable certainly, but lets not pretend that the military are the only people to have this done to them.