Related Clues:

• Six in Ireland capture one, for example for the blockade
• You're being attacked while under it
• "Dog Day Afternoon" event
• Silly ass united with bore
• Its happy ending comes as a relief
• Offensive encirclement
• Operation to capture a fort, for example
• Offence in which fortified place is surrounded
• Long drawn-out
• Drawn-out assault
• Military tactic
• Persistence over resistance
• Protracted battle
• __ mentality
• Battle of the Alamo, e.g