Why are you still guarding it?

A new camp commander was appointed and while inspecting the place, he saw 2 privates guarding a bench. He went over there and asked them why do they guard it.

"We don't know. The last commander told us to do so, and so we did!"

He searched for last commander's phone number, and called him to ask him why did he want guards in this particular bench.

"I don't know. The previous commander had guards, and I kept the tradition".

Going back another 3 commanders, he found a now 100 year old retired General.

"- Excuse me sir. I'm now the CO of your camp. I've found 2 guards assigned on a bench. Why did you put them there?"

"- What? The paint is still wet?!?"