Shield wall
A shield wall is a military formation where soldiers stand side by side, each holding a shield so they cover the person next to them. The result is a solid barrier of overlapping shields that protects the whole unit.
Different armies used shield walls in different ways. The Greeks fought in a phalanx led by hoplites, with large round or oval Aspis shields. Each shield partly protected the man to its left, creating a tight wall. The weakest or newest fighters often stood at the front center for security.
The Romans used large rectangular scuta that let soldiers form a wall, but the shields did not always overlap. They also developed the testudo or “tortoise”—outer ranks held shields in front and on the sides while inner ranks held shields overhead to protect from missiles. This was very protective but slow and easy for enemies to outmaneuver.
Other armies had their own versions. Late Roman and Byzantine forces used a pattern called fulcum, with locked shields and projecting spears. Some groups combined shield walls with spearmen behind them for stronger defense.
In northern Europe, shield walls were common in battles between Anglo-Saxons and Danes. Most fighters carried shields and spears, while a few wore heavier armor and axes. Shield walls were effective at close quarters, but once breached the whole line could fall apart, causing a rout.
Over time, higher cavalry and new weapons reduced the usefulness of shield walls. By the end of the Middle Ages they were largely replaced by other tactics, though modern police use shield walls with riot shields to protect against crowds.
This page was last edited on 2 February 2026, at 15:15 (CET).