Barrier troops

Barrier troops, blocking units, or anti-retreat forces are formations of soldiers that in some armies are placed behind regular troops on a battle line to prevent unauthorized withdrawal or retreat. Barrier troops are used to prevent unauthorized withdrawal of soldiers from the battlefield by any means, including indiscriminate killing. As troops guarding other units are obviously not available to fight the enemy they are a costly, often desperate, measure.

Barrier troops

Barrier troops, blocking units, or anti-retreat forces are formations of soldiers that in some armies are placed behind regular troops on a battle line to prevent unauthorized withdrawal or retreat. Barrier troops are used to prevent unauthorized withdrawal of soldiers from the battlefield by any means, including indiscriminate killing. As troops guarding other units are obviously not available to fight the enemy they are a costly, often desperate, measure.