Elements of Military Art and Science / Or, Course Of Instruction In Strategy, Fortification, Tactics Of Battles, &C.; Embracing The Duties Of Staff, Infantry, Cavalry, Artillery, And Engineers; Adapted To The Use Of Volunteers And Militia; Third Edition; With Critical Notes On The Mexican And Crimean Wars.

by H. W. Halleck

C—The main ditch.

D—The covered ways.

E—The re-entering places of arms.

F—The salient places of arms.

G—The demi-lune.

H—The demi-lune ditch.

J—The demi-lune redoubt.

L—The ditch of the demi-lune

redoubt.

M—The redoubt of the re-entering