In February 1914, still in Rome, he came into contact with Giuseppe Sprovieri and attended his Futurist Gallery, where (besides meeting Balla) he became friend of Cangiullo and Marinetti. Sprovieri placed him among the participants in the International Free Futurist Exhibition held in his Gallery, so Depero had almost immediately the opportunity to confront with prestigious artists of international importance, such as Archipenko, Larionov and Boccioni himself: unexpectedly he was the only one to sell all his paintings.
He returned to Trentino, soon afterwards, just while he was opening an exhibition in Trento, the 1st World War broke out. Then, after some vicissitudes, he was able to leave the country. He rushed back to Italy and settled in Rome where he began working with Balla. At the end of 1914, thanks to Balla’s mediation, it was officially admitted to the group of futurist painters and sculptors and, at the beginning of 1915, engaged in the construction of complex motorcycle-noise plastics, an original plastic experimentation of kineticism and noise.