Japan threatened to attack Chile while using submarines according to the U.S. Joint Intelligence Committee. Daily summary dated 19 February 1942

An item reported that the Chilean cabinet refused Japan to deliver manganese, nitrate and copper despite she was threatened to be attacked by submarines.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. MR0423. U.S. Joint Intelligence Committee. Daily summary No. 71 dated 19 February 1942