War isn't always about fighting.

Kill with me or die without me!

War both needs and generates certain virtues; not the highest, but what may be called the preliminary virtues, as valor, veracity, the spirit of obedience, the habit of discipline. Any of these, and of others like them, when possessed by a nation, and no matter how generated, will give them a military advantage, and make them more likely to stay in the race of nations.