Dear Bingley: "Camel flag" was WWI American soldier attempt to read French camouflage. Hors d'oevres were horse doovers. They thought "elle est chérie" referred to an anatomical structure.
After thinking a while, it came to me that the Trojan Horse was a form of decoy, a deception to entice enemy into danger or make some other error. Israelis used unmanned planes as decoys to entice Syrian ground-to-air missile sites to fire, revealing their location to Israeli planes. The Soviets dropped toys for Afghan children to pick up, which then exploded. The word "decoy" has come a long way from Dutch word for trap for ducks.