Quoting Grzegorz Rossoliński-Liebe’s Stepan Bandera: The Life and Afterlife of a Ukrainian Nationalist, pg. 75:

Mussolini’s Italy was another important partner of the OUN [Organization of Ukrainian Nationalists], as was the Croatian Ustaša, which was founded in 1929. Similarly to the OUN, the Ustaša operated until the Second World War as an ultranationalist terrorist organization. Like the OUN, it fought for an independent state against its “occupiers” and against its ethnic and political enemies in Croatia. Contact with Ustaša leader Ante Pavelić was established in late 1933 or early 1934 in Berlin, where Pavelić met with Iaryi and Lebed’. After this meeting the two OUN members visited the Ustaša camp in Italy. During the course of the cooperation between the two organizations, some OUN members were trained together with Ustaša activists in paramilitary camps in Italy, which were established and sponsored by Mussolini.

(Emphasis added.)