Related Clues:

• Offensive action to capture a fortified place
• Collective noun for a company of herons
• One, for example, in Kent can create a blockade
• Gee! Is this a complicated takeover campaign?
• ... blockade of south Belgian town � fifty lost
• Military action, say, is about capturing enemy primarily
• Lengthy bout
• Genghis Khan tactic
• Attack on a fort, e.g
• Protracted assault
• Attack on a fort
• Big battle
• Wait-'em-out strategy
• More than a skirmish
• Relentless attack