After the September 11th attack, the United States sent troops to Afghanistan.
Anyone who is capable of reading and understanding history, would instantly be aware of how pointless such action is.
Every invader from Alexander the Great to Genghis Khan to Tamerlane, passed through, for one can never conquer or control Afghanistan.
However, America sent troops which have remained to this day. There are various skirmishes that no one mentions or cares about.There are no protests, as there were about Vietnam. The few stray demonstrations that have occurred effect no more than traffic.
This is due to the oblivion and disinterest of Americans.