War is a method of untying with the teeth a political knot that would not yield to the tongue.
War is a matter of vital importance to the state, the road either to survival or to ruin.
War is a fundamental, beneficial possibility of political life. Because the state is an individual vis-a-vis other states. As such, it must engender an opposite and create an enemy.
War is a matter of vital importance to the state... the province of life or death... the road to survival or ruin. It is mandatory that it be thoroughly studied.
War is a bad and contemptible thing, but people at war are sometimes better than in everyday life.

War can be long --- the longest war in history was the Roman – Persian wars, lasting over 680 years (from 54 BC to 628 AD).

Pigeons have fought in war --- Thirty-two carrier pigeons were awarded medals by the United Kingdom for their service in World Wars I and II.