During World War I, Pskov became the center of much activity behind the lines. It was at a railroad siding in Pskov, aboard the imperial train, that Tsar Nicholas II signed the manifesto announcing his abdication in March 1917, and after the Russo-German Brest-Litovsk Peace Conference (December 22, 1917 – March 3, 1918), the Imperial German Army invaded the area. Pskov was also occupied by the Estonian army between 25 May 1919 and 28 August 1919 during the Estonian War of Independence when the White Russian commander Stanisław Bułak-Bałachowicz became the military administrator of Pskov. He personally ceded most of his responsibilities to a democratically elected municipal duma and focused on both cultural and economical recovery of the war-impoverished city. He also put an end to censorship of press and allowed for creation of several socialist associations and newspapers.