Down South during World War II, a sergeant gets a telephone call from a woman.
"I would love it," she said, "if you could bring five of your soldiers to my house for Thanksgiving dinner."
"Certainly, ma'am," replied the sergeant.
"Just make sure they aren't Jews," said the woman.
"Will do," replied the sergeant.
So that Thanksgiving while the woman is baking, the doorbell rings. She opens her door and, to her horror, five black soldiers are standing in front of her.
"Oh, my!" she exclaimed. "There must have been some terrible mistake!"
"Nope," said one of the soldiers. "Sergeant Greenberg never makes mistakes!"