After the 1905 revolution broke out, against the advice of her Polish and German comrades, Luksemburg left for Warsaw. If she were to be recognised then the tsarist authorities would imprison her, but the October/November political strike, part of the upheaval in Russia with particularly active elements in Congress Poland, convinced Róża that at this time her place was in Warsaw instead of Berlin. She arrived there on 30 December thanks to her German friend Anna Matschke's passport and met up with Jogiches, who had returned to Warsaw a month earlier also on a false passport; they lived together at a pension at the corner of Jasna and Świętokrzyska streets, from where they wrote for the SDKPiL's illegally published paper "Czerwony Sztandar" (The Red Banner). Luksemburg was one of the first writers to notice the 1905 revolution's potential for democratisation within the Russian Empire. In the years 1905-1906 alone, she made in Polish and German over 100 articles, brochures, appeals, texts, and speeches about the revolution. Although only the closest friends and comrades of Jogiches and Luxemburg knew of their return to the country, thanks to an agent placed by the tsarist authorities within the SDKPiL leadership the Okhrana came to arrest them on 4 March, 1906.