 He also ordered the strengthening of defenses in five subsidiary valleys as well as in the Panjshir, permitting a defense in depth, and withdrew his headquarters to Shira Mandara, in Takhar province, in anticipation of a renewed assault.In February 1984, Konstantin Chernenko replaced Yuri Andropov as General Secretary of the Communist Party of the Soviet Union.While Andropov had supported the ceasefire, Chernenko, a disciple of Brezhnev, believed that the guerrillas should be rooted out through military action, an opinion which he shared with Babrak Karmal, president of the DRA.