 With the annexation of Istria to the Kingdom of Italy after World War I, he settled in Zagreb.From February to December 1920 Laginja was ban of Croatia within the Kingdom of the Serbs, Croats and Slovenes.He was dismissed by the cabinet of Milenko Radomar Vesnić on December 11, 1920 after allowing a rally by Croatian Peasant Party politician Stjepan Radić in Zagreb on December 8.