The environmental scars of war
As well as the immediate death and destruction, armed conflicts have a long term effect on the places they’re fought in. Left over munitions and mines are an obvious problem- I knew they still dig up shells from World War 1, but hadn’t realised it was so bad there are still effective no-go zones- but knock on effects are also an issue. The focus of resources on the military lets other systes break down, and natural disasters are more devastating in war zones and their surroundings.
I addressed similar issues in Sounds of Soldiers, but didn’t imagine how much larger they truly are.