sentences:  Eulji Mundeok Hansi
  
  Eulji Mundeok Hansi is the oldest surviving poetry in Korean literature.In the second Goguryeo-Sui War, Eulji Mundeok maneuvered the Goguryeo troops so that they engaged the Sui army seven times a day, each time feigning defeat and retreating, leading the Sui army deeper south with the perception of victory.