text: Chapter 5
  Figure 5-18. Forward passage of lines
  REARWARD PASSAGE OF LINES
  5-161. Historically, Cavalry units conducting a rearward passage of lines have been associated with
  covering force operations. This remains true in the contemporary operational environment. Additionally, the
  nonlinear battlefield creates continuing requirements for rearward passage of lines. A rearward passage of
  lines occurs when a unit passes through another unit’s position while moving away from the enemy
  (ADP 3-90). This operation may or may not be conducted under threat pressure. An example of a rearward
  passage of lines is a Cavalry squadron as a covering force conducting a rearward passage of lines with the
  stationary unit in the main battle area. The covering force (Cavalry squadron) withdraws through the