A siege is a military tactic where an army surrounds a fortified place, such as a city or castle, to cut off essential supplies and force a surrender. This method often involves blocking roads and waterways, making it difficult for the inhabitants to receive food, water, and reinforcements. Sieges can last for weeks or even months, depending on the strength of the defenses and the determination of the attackers. Throughout history, famous sieges include the Siege of Troy and the Siege of Vicksburg. These events often lead to significant changes in power and territory. Sieges can also result in high casualties and suffering for the civilians trapped inside the besieged area.