BERLIN — Often, as I have passed through the main train station here in the German capital, I have seen the sad, lone figure of a soldier, heavy pack on his back, waiting for a train like the rest of us, but separated from the crowd by the uniform he wears. No one would stop to thank him for his service or to ask whether he had been deployed to Afghanistan.

The loneliness was obvious, but at times I even sensed what I thought might have been fear, at the occasional hostile looks the soldier would receive alongside the impassiveness of the broader masses on the platform, who just tried to pretend he wasn’t there.

In Afghanistan recently, where German troops are engaged in ground combat the likes of which their military hasn’t seen since World War II, I described my impressions of the home front to a group of soldiers from a reconnaissance company.

A staff sergeant, who had been risking his life almost daily outside Kunduz, recalled a trip to Berlin during which he was wearing his uniform at a train stop. He was told to make himself scarce or he would be beaten up.