Some of the current names for operations in Iraq and Afghanistan appear to be made to bolster a certain political viewpoint, rather than be used as cryptic codewords for a certain campaign or operation. For instance, the current American campaign in Afghanistan is codenamed Operation Enduring Freedom. Contrast this with the WW2 names for operations like Operation Market Garden and Overlord. When did this start (this probably doesn't have a factual question, as it is debatable whether certain codenames are selected for their propaganda value---if it turns into a debate, please move it, mods).
The earliest I can find is "Operation Just Cause", for the invasion of Panama in 1989. Is there an earlier one?