I remember a documentary that was shown recently. It showed the Russians burying the dead during WWII. In the spring, when the bodies thawed things got pretty bad. The bodies were beds of pestilence and disease. The weapons were mostly rendered useless by the elements and from contact with putrefying cadavers. They dug big pits and threw the bodies and equipment into them. They didn't even try to separate the the Soviet and Axis bodies. From the look of them, I don't blame them one bit.
The same thing was done in the may trenches and stronghold on the every front of the war. You had to get rid of the bodies as soon as possible, especially in the summer time. The niceties our armies appreciate today, just didn't exist back then.
African battlefields are littered with the dead, so are the SE Asian battlefields. The only ones that are at all worried about reclaiming the bodies for proper burial are the western participants. The Asians have a much more practical view of death and bodies. That doesn't mean they don't respect the dead or that under peaceful circumstances they don't perform ceremonial burials because they do it and with reverence.
Look at what they are still digging up from WWI. Both sides utilised shared mass grave sites. Not only that, just like WWII, Angola, Belgian Congo and Viet Nam to name a few, they forgot where a lot of them were or just accepted the fact that they received a warriors grave and as such honored their memories by leaving them be.
In another documentary, they were showing trenches outside of Stalingrad that were being excavated. They were doing this on a large scale and respectfully. The Soviets wanted to utilise the ground for crops but there was so much ordnance that was explosive cropping up and killing people, they couldn't persuade anyone to farm it seriously. They made an agreement to repatriate any bodies they found that could be identified with whatever nation they came from. The rest, went into mass graves. They were mostly jumbles of bones and impossible to put together into complete skeletons. They did keep all of the ID tags they could locate and send them back though. When they unearthed the bodies, many were less than a meter beneath the surface. All of their equipment was buried with them. Even the Soviet soldiers didn't loot the bodies of valuables, like wallets, medals and desperately needed boots. They may have hated them but still respected the dead. I don't know, maybe it was just superstition or maybe they hated the axis troops so much they refused to have anything to do with them.
Times were different back then. It wouldn't take a lot for things to degenerate to those levels again. Look at the underlying religious and racists ideas that exist in the world today. The middle east is just starting to boil over. Look at Canada, UK, USA, France and the rest of Europe. There are a lot of inbred antagonisms still in play just beneath the surface. Once they get a chance to be released with impunity, they will emerge with a vengeance.
One thing about those bodies, they serve as a reminder to humanity's dark side. That really bothers a lot of people. As far as I'm concerned, the dead are husks. What made them vibrant and individual, is long gone. They are past caring. That doesn't mean we should disrespect them or their sacrifices, no matter which side they were on. Lets face it, no rational man wants to go to war. Not in our society anyway. In some societies, that just isn't the case. Either that or the difference between living and dieing is nothing.