Forests are drastically affected by wars on account of a variety of reasons. During the World Wars, Britain was ruthless in cutting down forests in India for war needs. To avoid Japan the profits from the forest industry, the Dutch destroyed saw mills and teak logs in Java. This blind destruction and cutting down of forests to fulfill national war requirements affects forests as they get depleted rapidly and are slow to grow back.thus 
1 1 1
  • Kjp
  • Ambitious
When a war takes place people ended many things- food,firewood,sight of enemy etc.,
Therefore if it takes place in a forest the people cut off the trees to use the resources like you can get fruits,firewood, you can make wooden nails and posts to hold your tents,etc., so wars bring about the destruction of many trees.