Early in January Juche 28 (1939) when the main unit of the Korean People's Revolutionary Army led by the President arrived at Qidaogou gully in Changbai County of China through nearly one month-long march, the Japanese imperialist aggression army was tightening a siege with airplanes and reinforcements. Penetrating into the prevailing situation, the President ordered the unit to conduct dispersed action in three directions so as to throw the enemies into confusion. After all, the enemies' scheme came to failure.

In spring that year, he led the attack on Banjiegou to victory by taking advantage of an eclipse of the moon.

In August 1940, he employed a "telescope tactic" to make the enemy forces fight each other at a swamp near Huanghuadianzi.

That's why a Japanese praised the distinguished military wisdom and matchless braveness of the President by publishing a book "The Protean Anti-Japanese Guerillas" in the 1970s.