Enjoying a production run that spread out over 14 years, over 290,000 of these machines were produced. Around 1940, the cost of the Farmall M was around $1,100. The cost of the Farmall MD was around $1,700. Many of the Farmall M tractors are still in use today, and parts are readily available. As far as collectability, these are the least popular of the letter series, most likely due to their large size.
The reason for rules in war is simple: people value life. The rules of war are mostly about giving people a way to lose without dying. Rules, such as the use of a white flag, give people a way to surrender. Bans on chemical and biological weapons prevent indiscriminate and uncontrollable killing. And rules protect POWs.
War is a state of armed conflict between societies. It is generally characterized by extreme aggression, destruction, and mortality, using regular or irregular military forces. An absence of war is usually called peace. Warfare refers to the common activities and characteristics of types of war, or of wars in general.