war charity, Appui aux Artistes that assisted needy artists. She also organized the American-Yugoslav relief fund for children. While working for the Red Cross during World War I, Hoffman traveled to Serbia. She made a larger-than-life-sized work of Croatian sculptor Ivan Meštrović, with whom she studied. Her sister, Helen, was on the board of the Red Cross, which sent clothing and medical supplies for the Serbian cause. Through her sister, she met Serbian Colonel Milan Pribićević in 1916, who inspired her when he came to the United States and delivered rousing speeches in which he asked Serbian immigrants to fight to save their homeland. Hoffman, who may have had a romantic relationship with the colonel, had an interest in "powerful, charismatic" people. She once said, "Hero worship formed a major part of my emotional life." He modeled for her sculpture of him entitled A Modern Crusader (1918). His nephew said that it capture that "he was gaunt and weary. His eyes were deep sunk in their sockets ... Only his firm mouth and his powerful chin showed no trace of the inhuman punishment which his body and soul had received during half a decade of life in the trenches." There are casts at the Metropolitan Museum of Art, Smithsonian American Art Museum, and Art Institute of Chicago. She also authored the well known poster "Serbia needs your help". She based it on the Miloje P. Igrutinović's photo of dead Serbian soldiers, who died of hunger and exhaustion on the Greek island of Vido. She made the soldier "alive" on the poster and later, as a sort of an artistic installation, posted soldier's head on the bronze statue of the Saint Francis of Assisi in front of the Mayo clinic in Rochester, Minnesota. In 2018 an exhibition "Who is Malvina Hoffman" dedicated to Hoffman was open in Novi Sad, Serbia. It was part of the wider project "Serbia, war and posters" by the state government. The Hoffman exhibition, organized in cooperation with the US embassy in Belgrade, which later toured the entire Serbia. Among other exhibits, Hoffman's drawings which she made when she visited Serbia in 1919 were also displayed. She published her impressions about the visit in the chapter Hunger in the Balkans of her book Heads and Tales. The poster "Serbia needs your help" later circulated around the United States, being located in a library of a local politician