Today in World War II History—March 29, 1941

Advertisement for WLS radio in Chicago, announcing its 29 March 1941 move from 870 to 890 kHz, from 24 March 1941 issue of Broadcasting (public domain via Wikipedia)
85 Years Ago—Mar. 29, 1941: Battle of Cape Matapan concludes: British ships sink Italian heavy cruisers Pola and Zara; in 2-day battle, 2303 Italians killed and 3 British; Italian navy rarely ventures from port after this.
Vichy France establishes office for Jewish affairs (Commissariat Général aux Questions Juives) under antisemitic Xavier Vallat.
North American Regional Broadcasting Agreement (Havana Plan) goes into effect, distributing AM radio frequencies, adding about 1000 stations and changing the radio dial frequencies of 795/883 stations in the US, dubbed “Radio Moving Day.”

Italian battleship Vittorio Veneto firing during Battle of Cape Matapan near Gavdos, Greece, 28 Mar 1941 (public domain, Ministero Della Difesa-Marina)