OK.... so in reality, there isn't a rank of "rear general". There is, however, a rear admiral, having a rank equivalent to a Major General in the other Armed Forces. The cache name was used for the spirit of the ultimate word play... a pun or paronomasia
Rear Admiral, sometimes referred to as Rear Admiral Upper Half, is a two-star flag officer rank in the U.S. Navy equivalent to the rank of Major General in the other Armed Forces. Rear Admiral is the highest naval rank maintained during peacetime, as all higher ranks are temporary and linked to a specific position. A Rear Admiral generally commands a fleet of Navy ships, submarines, and air wings. As a flag officer, a Real Admiral may fly the Rear Admiral's pennant over any ship or base on which he is serving; the flag has two white stars on a navy-blue background.
You are looking for a hanging camo'd pill bottle. Should be easy, even without the spoiler hint. As, always, exercise stealth to help protect the cache from being muggled. BYOP Enjoy!
Congrats to Rooster 6 for the FTF!