1.   And it may learn that knowing thy enemy is only half the battle.

2.   -- The fine hairs growing between his eyebrows indicate that he knows his enemies and carries a grudge.

3.   But scientists and doctors have come to know the enemy, intimately.

4.   For McCain, the Naval aviator who spent more than five years in a Vietnam prisoner of war camp, this is war, and he knows the enemy.

5.   I tried hard to know the enemy, the better to defeat him.

6.   If war is a matter of knowing your enemy, he has already lost.

7.   In the end he was defeated, but it was a fair fight because he knew the enemy so well.

8.   Know your enemy.

9.   Known enemies?

10.   Know the enemy.