we don't have trees older then 90 years around here...in fact, we have nothing older then 90 years in this area. My house was built in 1923, it was one of the earlier houses in the area. Not the earliest, but still very early.
1914 first troops arrive, thinking they will be home for X-mas
City Square , different angle in 1918
Emergency Barracks errected right after the war, by 1925 they started tearing these down to replace em with real housing
Modern day City center, the house where i grew up would be just on the left of the picture.
There is actually one of the emergency houses from those days, that survived. It has been modified over the years, but now serves as some kind of hotel/studio for rent.
http://www.thuzetje.be/EN/default.htm
Not cheap though.