Yep, I have always been taught this kind of thing. Actually my favorite teacher in high school ws a ex marine who stated this fact quite a few times in class. But on a lighter note, I usually dont post email jokes but I think this kinda reflects what the OP said but humorously 
President Barack Obama was in the Oval Office when his telephone rang.
"Hello, President Obama” a heavily accented southern voice said. "This is Archie, down here at The Catfish shack down here in Lucedale, Mississippi and I am callin' to tell ya’ll that we are officially declaring war on ya!"
"Well Archie," Barack replied, "This is indeed important news!
How big is your army?"
"Right now," said Archie, after a moments calculation "there is myself, my cousin Harold, my next-door-neighbor Randy, and the whole dart team from Hooters. That makes eight!"
Barack paused. "I must tell you Archie that I have one million men in my army waiting to move on my command.."
"Wow," said Archie. "I'll have at call ya back!"
Sure enough, the next day, Archie called again. “Mr. Obama, the war is still on! We have managed to acquire some infantry equipment!"
"And what equipment would that be Archie?" Barack asked.
"Well sir, we have two combines, a bulldozer, and Harry’s Farmall Cub."
President Obama sighed. "I must tell you Archie, that I have 16,000 tanks and 14,000 armored personnel carriers. Also I've increased my army to one and a half million since we last spoke."
"Lord above", said Archie, "I'll be getting back to ya."
Sure enough, Archie called again the next day. “President Obama! I am sorry to have to tell you that we have had to call off this here war."
"I'm sorry to hear that" said Barack. "Why the sudden change of heart?"
Well, sir," said Archie, "we've all sat ourselves down and had a long chat over sweet tea, and come to realize that there's just no way we can feed two million prisoners."
President Barack Obama was in the Oval Office when his telephone rang.
"Hello, President Obama” a heavily accented southern voice said. "This is Archie, down here at The Catfish shack down here in Lucedale, Mississippi and I am callin' to tell ya’ll that we are officially declaring war on ya!"
"Well Archie," Barack replied, "This is indeed important news!
How big is your army?"
"Right now," said Archie, after a moments calculation "there is myself, my cousin Harold, my next-door-neighbor Randy, and the whole dart team from Hooters. That makes eight!"
Barack paused. "I must tell you Archie that I have one million men in my army waiting to move on my command.."
"Wow," said Archie. "I'll have at call ya back!"
Sure enough, the next day, Archie called again. “Mr. Obama, the war is still on! We have managed to acquire some infantry equipment!"
"And what equipment would that be Archie?" Barack asked.
"Well sir, we have two combines, a bulldozer, and Harry’s Farmall Cub."
President Obama sighed. "I must tell you Archie, that I have 16,000 tanks and 14,000 armored personnel carriers. Also I've increased my army to one and a half million since we last spoke."
"Lord above", said Archie, "I'll be getting back to ya."
Sure enough, Archie called again the next day. “President Obama! I am sorry to have to tell you that we have had to call off this here war."
"I'm sorry to hear that" said Barack. "Why the sudden change of heart?"
Well, sir," said Archie, "we've all sat ourselves down and had a long chat over sweet tea, and come to realize that there's just no way we can feed two million prisoners."
