The War is older than the Soldiers

The newest troops to deploy to Afghanistan can barely remember 9/11.

The newest wave of troops hitting the Afghan battlefields are 19 or 20 years old, meaning they were roughly between 8 and 10 when al Qaeda crashed planes into the World Trade Center, Pentagon and a Pennsylvania field. The fourth- and fifth-graders knew something big had happened but were often unable to understand why it mattered until years later. Such a mismatch hasn't happened since the country was founded, largely because its greatest wars have tended to be brief interludes, not semipermanent features.