533
WASHINGTON _ Having punched through severely depleted Republican Guard divisions that formed Baghdad ' s outer defensive ring , U . S . Army and Marine forces are likely to pause again to test the Iraqi capital ' s inner defenses and waall but evaporated under the weight of the U . S . assault .
 ( attack: punched through,  forces: attacker, divisions: target) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: declare bankruptcy, transfer ownership, transfer money, marry, transport, die, phone write, arrest jail, convict, sentence, sue, end organization, start organization, end position, start position, meet, elect, attack, injure, born, fine, release parole, charge indict, extradite, trial hearing, demonstrate, divorce, nominate, appeal, pardon, execute, acquit, merge organization, Arguments type: beneficiary, prosecutor, plaintiff, seller, victim, buyer, agent, destination, artifact, organization, recipient, person, place, origin, target, giver, adjudicator, attacker, vehicle, defendant, entity, instrument. 
Text: {0} 
Answer:
 ( attack: punched through,  forces: attacker, divisions: target) 