Recognizing how dangerous this type of fighting could be, each side also built elaborate earthworks to protect themselves.

Union soldiers built earthworks to protect the complex, incorporating an old Indian mound into the defenses.

Both sides are building extensive new earthworks around their positions in technical violation of the cease-fire.

Grant finally realized the situation he faced with a divided army and ordered his men to stop advancing and to build earthworks of their own.

Mound builders occupied numerous areas along the Ohio River and built complex earthworks.

Its peoples were noted for their hierarchical communities, building complex earthworks, platform mound architecture; and intensive cultivation of maize.

Washington ordered his men to build earthworks that were parallel to the south bank of the Assunpink Creek.

The Confederates built earthworks and trenches in the town, covering the remains of several burnt structures except for the church.

They also built earthworks for a South-to-West connection, but tracks were never laid.

The first attack on the city was entirely repulsed, so Sulla decided to build huge earthworks.