Heh, time to bust out the old classic:
It is 1939 and a Soviet army is marching on Finland. As they pass the border, they hear a Finnish voice over the hill;
"One Finnish soldier is better than 10 Soviet soldiers!"
The Soviet general laughs, as he sends 10 men on the hill to capture it.
There is gunfire for a minute and then everything goes silent for a moment, and they then hear the same voice;
"One Finnish soldier is better than a hundred of yours!"
Annoyed, the Soviet general sends hundred men to capture the hill. There is gunfire and bombs going for ten minutes, and everything goes silent again. Suddenly, the same voice yells out;
"One Finnish soldier is better than thousand of Soviet soldiers!"
Enraged, the general sends a thousand men, accompanied with tanks, artillery, mortar teams, and tells them to not return until the hill is theirs.
For half an hour hell breaks loose, bombs and explosions, gunfire, screams and death all around, and then it goes silent again.
One Soviet soldier crawls back, severely wounded and battered.
Before the general could say anything, the soldier says; "Do not send more troops, comrade general, it's a trap! There is two of them."