Defense in depth

Defense in depth employs multiple prepared defensive lines arranged in depth rather than relying on a single position. Each line is designed to absorb, delay, and disrupt the enemy while preserving friendly combat power.

Forces transition between static defence and fighting retreat as pressure increases. Forward elements fix and attrit the enemy, then withdraw in a controlled manner to subsequent positions, maintaining cohesion and mutual support throughout the depth of the defence.

Defence in depth emphasizes:

• Layered positions to prevent a single point of failure
• Planned displacement between lines rather than ad hoc withdrawal
• Continuous engagement to degrade enemy momentum over time

This approach is effective when terrain allows depth, preparation time is available, and the commander intends to delay, exhaust, or canalize the enemy before decisive engagement.