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Overnight and early this morning , the tanks and Bradley fighting vehicles of the 3rd Infantry Division backed by the Apache attack helicopters of the 11th Aviation Regiment punched through the Republican Guard defenses in and around Karbala .
 attack: punched through
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: declare bankruptcy, transfer ownership, marry, die, phone write, arrest jail, convict, sue, transfer money, end organization, start organization, end position, merge organization, start position, transport, charge indict, elect, attack, injure, born, extradite, release parole, sentence, demonstrate, meet, trial hearing, divorce, nominate, fine, appeal, pardon, execute, acquit 
Text: {0} 
Answer:
 attack: punched through