I recommend this You Tube video highly without reservation or qualification.
Devoted readers to the blog should consider this to be a MUST see!
"Life After People" an entire series of You Tube videos. speculative but informative and entertaining at the same time.
WHAT WOULD OCCUR IF ALL HUMANS FOR WHATEVER REASON WERE TO INSTANTANEOUSLY DISAPPEAR, NEVER AGAIN TO REAPPEAR!
Episode S01E08 having a military dimension. Consider: "Life After People Armed and Defenseless".
Artifacts of war how well will they withstand the elements over an extended period? Days, weeks, months, years, decades, centuries, millennium and even beyond that! Machines of war and structures seemingly so robust but is that so?
Indeed, even now in areas of the world such as the Demilitarized Zone [DMZ] in Korea or the Falkland Islands can we see a landscape returning to the natural state, and doing so in a surprisingly fast manner.
Rain, wind, bird droppings, rust can take a toll and fast. NO denying that.