When a building is surrounded to prevent movement, this tactic is known as what?

The tactic of surrounding a building to prevent movement is known as blockade. This involves establishing a perimeter around a specific area to restrict access and control the movement of people or objects entering or exiting. The goal of a blockade is to contain a situation, ensuring that individuals within the area cannot escape while also prohibiting unauthorized entry, often used in law enforcement to manage potentially volatile situations.

In contrast, encirclement implies a more comprehensive strategy where multiple units surround a target from all sides, while isolation focuses more on cutting off access and support from external resources. Picketing typically refers to a demonstration or protest, where participants stand or walk in a specific place to express their views. The nuanced distinctions among these terms highlight the specific purpose and execution of a blockade in a law enforcement context.