In 1917, as a result of the October Revolution, Russia became a communist state. In the aftermath of World War I, Poland reemerged as an independent country in the following year. From 1919 to 1921, the two states fought the Polish–Soviet War which was concluded with the Peace of Riga. Article 11 of the peace treaty required that the Soviet side return all culturally significant collections and items that had been removed from Poland since the First Partition in 1772. A special bilateral committee was set up to carry out the restitution of cultural goods. In 1928, the committee's efforts resulted in the return to Poland of, among other national treasures, Szczerbiec, which, after 133 years, was deposited back in the Wawel Castle.