“Yes,” I said, “but that was a special case because it was a fortress rather than a mountain, anyway. The Austrians had been fortifying it for years.” I meant tactically speaking in a war where there was some movement a succession of mountains were nothing to hold as a line because it was too easy to turn them. You should have possible mobility and a mountain is not very mobile. Also, people always overshoot down hill. If the flank were turned, the best men would be left on the highest mountains. I did not believe in a war in mountains. I had thought about it a lot, I said. You pinched off one mountain and they pinched off another but when something really started everyone had to get down off the mountains.

What were you going to do if you had a mountain frontier? he asked.

I had not worked that out yet, I said, and we both laughed. “But,” I said, “in the old days the Austrians were always whipped in the quadrilateral around Verona. They let them come down onto the plain and whipped them there.”