The tactics based on tunnel positions was a powerful one that made it possible to preserve the personnel and weapons and combat equipment of our army to the maximum from enemy attacks, defend the occupied defence line and destroy more of the enemies.

Its efficiency was clearly proved in the battle on Height 153.7 in the east front in July Juche 41 (1952). In order to seize this small height defended by a company of our army, the enemy pounded the height with flying corps and thousands of shells to turn it into a sea of flames and dispatched a specially-trained regiment. The company defended the height after killing more than 900 enemy troops, without any human loss in the 14-hour ceaseless battle against the enemies which outnumbered our force.

The victory in the well-known battle on Height 1211 was a brilliant fruition of the tunnel tactics advanced by the President.

On September 23, 1951, he personally came to Height 1211 in the east front and indicated the orientation and ways for smashing the U.S. imperialists' frantic "autumn offensive" and took measures to make tunnel-based defence positions.

In order to occupy Height 1211, a military strategic vantage, the enemies showered 4 160 bombs and 527 260 shells on every square kilometer of the height in 1952 alone.

But the brave soldiers of the Korean People's Army by relying on the tunnel positions dealt a telling blow to the U.S. imperialist aggressors who were running wild, believing in their military muscle.

Ridgway, the chieftain of the U.S. imperialists' war, cried out in distress that the tunnel-based defence line of the People's Army would be the most powerful one known to the world.

The tunnel tactics provided a model of modern defence warfare in defeating the enemies, superior in numerical strength and military technique, with less personnel and conventional weapons, not yielding even an inch of land of the country.