The Commanding General is supposed to visit the unit, so, in order to appear snappy, the captain stations a private as a sentry outside the front door.
"Inform me immediately upon the General's arrival," the captain orders the Private.
"Yes sir!" the Private Responds.
An hour goes by, and the General hasn't arrived.
The worried Captain checks with the Sentry.
"Did the General arrive?"
"No Sir!"
Another 1/2 hour goes by and the captain, getting nervous, checks with the sentry again?
"Hasn't the General arrived yet?"
"No Sir!"
This continues for two hours.
Finally, the General arrives.
"Where the hell have you been?" snapped the private, "The captain's looking for you!"