Which term describes a barrier intended to stop an enemy's advance?

The term "barricade" specifically refers to a structure or barrier that is built or erected in order to block or impede an enemy's movement, typically during a conflict or battle. Barricades are often made from materials that can obstruct passage, such as furniture, wood, or other available resources, and are primarily utilized by defenders to control access and protect a position.

While a "wall" can serve a similar purpose by providing a permanent defense, it is generally more associated with fortifications that are built for long-term use. A "fortress" refers to a much larger and more complex structure designed to provide strong defense against attacks, often encompassing a variety of protective mechanisms and infrastructure. The term "barrier" is more generic and can refer to any obstacle that blocks movement, not necessarily one built for defensive purposes. Hence, "barricade" is the most precise term for a temporary or improvised structure used specifically to stop an enemy's advance.