What operation allows a force to move forward or rearward through another force's positions?

The operation that permits a force to move forward or rearward through another force's positions is known as "passage of lines." This maneuver is critical in military operations, particularly in situations where two friendly forces are in close proximity but need to continue their own movements without disrupting each other's operations.

During a passage of lines, one unit crosses the front of another unit's position. The unit that is passing through does so with minimal interference, maintaining coordination with the unit that is allowing the passage. This operation is essential for maintaining the momentum of an offensive or defensive operation while ensuring that both forces can operate effectively without confusion or risk of fratricide.

The scenario relates to situations where forces need to reposition themselves for tactical advantage or logistics, ensuring that the stream of operations remains fluid and effective. This allows for the continuity of mission objectives while ensuring the safety and efficiency of both units involved.