Sheialwall ✔

"The warriors stood shoulder-to-shoulder, locking their wooden shields into a solid shield wall . This overlapping formation served as a living fortress, protecting the front ranks from arrows and spear thrusts.".

Alternatively, if you meant a structural term, a is a rigid vertical element designed to resist lateral forces like wind and earthquakes.

Here are a few ways to "put together" a text or description depending on your focus: