If you're trying to use a word related to siege, here are some examples:
Siege:
* The soldiers besieged the castle for weeks.
* The city was under siege for months.
* The siege of Troy lasted for ten years.
Besiege (verb):
* The enemy forces besieged the town.
* The protestors besieged the government building.
Let me know if you had a different word in mind, and I'll do my best to help!