It's fascinating when you visit these places to see how much of this stuff that got left behind after the war got repurposed and is still in use today. I spent a couple months in the highlands of PNG some time back and noticed pierced steel plank from a former air base everywhere in use as fencing and even as part of structures. Drop tanks were partly buried and used as road signs, and if the locals ever wanted to show their displeasure with the government, they just dragged a 500lb bomb out of the jungle, put it under a bridge and lit a fire on it.