Plate 27p.—Arrangement of a large ditch.
Plate 27q.—Arrangement of a ditch full of water.
Ordinary roads, road and railroad embankments, and sunken roads:
Plate 27r.—Arrangement of an ordinary road defended on the side toward the enemy.
Plate 27p.—Arrangement of a large ditch.
Plate 27q.—Arrangement of a ditch full of water.
Ordinary roads, road and railroad embankments, and sunken roads:
Plate 27r.—Arrangement of an ordinary road defended on the side toward the enemy.