 In a memoir, Anton Probsthan of Mecklenburg, who served in the Lützow Free Corps, claimed his relative Fraulein Nitschke of Jena presented the Burschenschaft with a flag at the time of its foundation, and for this purpose chose the black-red-and-gold colors of the defunct secret society "Vandalia".Since the students who served in the Lützow Free Corps came from various German states, the idea of a unified German state began to gain momentum within the and similar Burschenschaft that were subsequently formed throughout the Confederation.On 18 October 1817, the fourth anniversary of the Battle of Leipzig, hundreds of fraternity members and academics from across the Confederation states met in Wartburg in Saxe-Weimar-Eisenach (in modern Thuringia), calling for a free and unified German nation.