How Do You Do Battle

How do you do battle with your enemy? | With regard to defence, the purpose of the military is to defend the nation and be prepared to do battle with its enemy. | The idea is to destroy the enemy's productive capacity and depending upon the economic foundation, that productive capacity is different in each case. | Now in the information era, destroying the enemy's productive capacity means destroying the information infrastructure. | But in the industrial era destroying the enemy's productive capacity means bombing the factories which are located in the cities. | So in the agrarian era, if you need to destroy the enemy's productive capacity, what you want to do is bum his fields, or if you're really vicious, salt them.