This is a pretty broad topic, but you may be able to help me anyway. We have all seen wartime photos of famous Western Front sites, and can find thousands of modern shots of the same scenes. But I'm interested to know how these sites developed in the intervening years. Do you have photos of Western Front sites taken in post-war years (about 1920s-1980s) that show how these sites have changed over time? This is purely for my own interest - I'm not going to reproduce your shots anywhere.
To start the ball rolling, here's a shot of the Pozieres Windmill site in 1917 and another one taken in 1935 (I've 'borrowed' these from the AWM website but as this is only a private research matter it should be OK).
Interested to see what we come up with.