Cap Badge - Canadian Forestry Battalion, BC. The Canadian Forestry Corps was an organizational corps of the Canadian Army during both World Wars. 14 Nov 1916: Canadian Forestry Corps created, formed from an existing forestry battalion (224th Battalion, CEF) and the conversion of other infantry battalions (including the 238th Battalion, CEF) for forestry duties. The Canadian Forestry Corps provided lumber for the Allied war effort by cutting and preparing timber in the United Kingdom and on the continent of Europe in both the First World War and the Second World War. Forestry units also cleared terrain for the construction of installations such as airfields and runway, prepared railway ties, as well as lumber for the creation of barracks, road surfaces, ammunition crates, trench construction, etc. These units were sometimes called on in the First World War to perform as infantry.