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.
The lawfulness of a targeted killing hinges in part on the applicable law, which is determined by the context in which it takes place. International humanitarian law (also known as the laws of war) is applicable during armed conflicts, whether between states or between a state and non-state armed groups. Hostilities between a state and an armed group are generally considered to be an armed conflict when violence reaches a significant threshold and the armed group has the capacity to abide by the laws of war. Rules of international humanitarian law are found in the Geneva Conventions of 1949 and its two Additional Protocols, the 1907 Hague Regulations, and the customary laws of war. Among other things, these rules regulate the conduct of hostilities, including the targeting of combatants, in all armed conflicts.