"There wasn't anyone to fight. Wasn't even anyone to guard against, or so I was told. Damned foolish business, I say."
"Why, sir?"
"Because an old soldier knows that you can never tell when an enemy might spring up. It could happen now. And then where would we be?"
"Couldn't the armies be formed again?"
"Certainly. But the present generation has no concept of serving under arms. There are no leaders left, outside of a few useless old fools like me. It would take years for an effective force, effectively led, to be formed."
"And in the meantime, Earth is completely open to invasion from the outside?"
"Yes, except for the police units. And I seriously doubt their reliability under fire."
"Could you tell me about the police?"
"There is nothing I know about them. I have never bothered my head about non-military matters."
"But it is conceivable that the police have now taken over the functions of the army, isn't it? That the police constitute a sizable and disciplined paramilitary force?"