21.  Allied forces pressed the assault with air attacks and sporadic ground combat with enemy forces, defense officials said.

22.  But it threw its pieces into battle, taking good posts away from the enemy forces, and held on in a rook-and-pawn endgame.

23.  Cruise missiles could be fired from warships in the Arabian Sea to shatter an enemy force or press it from hiding.

24.  Efforts to dislodge Al Qaeda and Taliban forces continued over the weekend with at least two engagements with enemy forces, defense officials said.

25.  Enemy forces in Afghanistan have learned from previous U.S. attacks that bunching up is not safe, Pentagon officials say.

26.  Enemy forces will be especially intent on causing high-visibility American casualties at the start of an operation, intelligence analysts say.

27.  Enemy forces made a detailed search impossible.

28.  Enemy forces were probing the outer perimeter of the base in the night.

29.  Exactly how big is the enemy force?

30.  Enemy forces are gathering again in a region of Afghanistan where Osama bin Laden once held sway, Pentagon officials said Tuesday.