Kim Jong Un's work "The Cause of the Great Party of Comrades Kim Il Sung and Kim Jong Il Is Ever-Victorious" on the occasion of the 6th anniversary of Kim Jong Un's assumption of the supreme commandership of the Korean People's Army.

The work, published on October 4, Juche 104 (2015), clarifies that the seven decades-long history of the Workers' Party of Korea is the one of victory which demonstrated the validity and invincibility of the cause of the party of President Kim Il Sung and leader Kim Jong Il. It also stresses that the cause of the party of Kim Il Sung and Kim Jong Il is invincible.