Historically an infantry square is a combat formation an infantry unit forms in close order usually when threatened with cavalry attack.

The infantry square was used as protection from cavalry charges.

Another formation that saw use was the infantry square.

Gérard was captured and Bernadotte had to take shelter inside of an infantry square.

The charge broke the formed infantry square, a remarkable feat.

His second thought was that he had left his pistols inside the infantry square.

He defeated the Mamluk cavalry using a larger version of the common infantry square, with cannons and supplies safely on the inside.

In the morning, they catch up to him, but he is able to outrun them and gains the protection of a French infantry square.

Cavalry cannot break a well-formed infantry square.

Pully's troopers tried to break the Austrian infantry squares but they were unsuccessful.