The Paper Brigade was the name given to a group of residents of the Vilna Ghetto who hid a large cache of Jewish cultural items from YIVO (the Yiddish Scientific Institute), saving them from destruction or theft by Nazi Germany. Established in 1942 and led by Abraham Sutzkever and Shmerke Kaczerginski, the group smuggled books, paintings and sculptures past Nazi guards and hid them in various locations in and around the Ghetto. After the Ghetto's liquidation, surviving members of the group fled to join the Jewish partisans, eventually returning to Vilna following its liberation by Soviet forces. Recovered works were used to establish the Vilna Jewish Museum and then smuggled to the United States, where YIVO had re-established itself during the 1940s. Caches of hidden material continued to be discovered in Vilna into the early 1990s. Despite losses during both the Nazi and Soviet eras, 30–40 percent of the YIVO archive was preserved, which now represents "the largest collection of material about Jewish life in Eastern Europe that exists in the world".[1]