Having more farmland during a war would allow for a larger capacity to produce food to feed the army. As the infantry is focused on the battle, things like food and other essential commodities increase in their intrinsic value because of what it represents, in that food gives energy to troops and the troops need energy to fight and win the war and/or battles. Napoleon and Frederick the Great are both attributed with saying "An army marches on its belly". Meaning fighting needs fuel and that fuel for soldiers is food, thus the importance of having a significant amount of farmland.
The war in America in which France and its Indian allies opposed England 1754-60: ended by Treaty of Paris in 1763. The Treaty of Paris is the agreement between the Kingdom of Great Britain and its 13 former colonies in North America, now known as the United States of America.
without sufficient metal to make things such as axes and saws we would have never made anything out of wood and be stuck living in mud huts and the like