The ancient Greeks made the Trojan Horse the most famous disguise of all time, which, as we've noted before, was a mind-blowing achievement in propaganda -- no one would really try to sneak past enemy defenses inside a huge wooden horse. No, in real life, armies have much, much stupider methods. Like ...
6The Papier-Mache Horse Carcass
During World War I, both sides sat in trenches for literally years on end, blasting away at each other until the terrain in between them came to resemble a barren, post-apocalyptic wasteland. This created a problem: How do you sneak out toward the enemy trenches without being seen when you've already obliterated everything around you until the entire landscape is just a flat expanse of charred dirt and corpses? Well, the French army had a perfect way to solve this: Disguise yourself as a dead thing.
The idea came when a horse broke loose, ran wildly toward the German trenches and got shot in what was probably the animal version of suicide by cop. "Hmmm," somebody said, "look at that horse carcass -- you could almost hide a dude inside one of those." Of course, hiding a soldier in the actual carcass would be crazy. No, they did the sane thing and built a hollow papier-mache replica of the dead horse, with a gun port elegantly situated in its anus.
Sometimes war has a dark grandeur. This was not one of those times.
After dark, a group of men sneaked out into no man's land right up near the German trenches, dragged away the dead horse and replaced it with the model with a sniper inside. He also had a telephone wire that ran back to his own trenches so he could send back reports of German movements.
They kept this up for three days before some German soldier just happened to spot a man climbing out of the dead animal they'd shot a few days before, probably thinking it was giving birth to him, like in that Ace Ventura sequel. Still, they destroyed the decoy, which didn't stop the French from trying it again a few more times.
Some attempts were better than others.