War is the domain of physical exertion and suffering.

War is not merely a political act but a real political instrument, a continuation of political intercourse, a carrying out of the same by other means.

Everything in war is simple, but the simplest thing is difficult. The difficulties accumulate and end by producing a kind of friction that is inconceivable unless one has experienced war.

War is the domain of physical exertion and suffering.

To secure peace is to prepare for war.

War is the province of chance. In no other sphere of human activity must such a margin be left for this intruder. It increases the uncertainty of every circumstance and deranges the course of events.