Chris Evan
This sums it up nicely: "War is not only an act, but a state or condition, for nations are said to be at war not only when their armies are engaged, so as to be in the very act of contention, but also when, they have any matter of controversy or dispute subsisting between them which they are determined to decide by the use of force, and have declared publicly, or by their acts, their determination so to decide it. "