768
Along the city ' s southern edge , U . S . tanks and Bradley vehicles destroyed at least seven Iraqi armored personnel carriers and more than 15 Iraqi tanks in fighting that went on for more than four hours .
 None
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: attack 
  Option: victim, attacker, place, target, instrument 
Text: {0} 
Answer:
 None