What companies have ever gone to war? The only one I can think of that would even come close is the East India Company, and they were SO far in bed with the government that it would be corporatism bordering on fascism. The Pinkertons were really more of a police agency that had some decent power in various localities, but not a huge national presence at any given time.
If companies took on the characteristics of nations (like the East India Co.), they would go to war. Right now they can't because they don't have the power to use violent force, because a government would stop them, and they know the government is more powerful.
You're right that the MORE efficient government wins the war, but the war itself is inefficient for BOTH sides. Tell me, in which 20th century war exactly was the winning party far better off than they were before the war? There are no "winners" in war. Everyone loses.
The United States, in both World War I and World War II. Those two wars made our empire.
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