October Incident happened in 1931.
if youre talking about the publicity stunt one then it was october 18 2009
Laconia incident happened in 1942.
Shishou incident happened in 2009.
Kattegat incident happened in 1963.
Jinan Incident happened in 1932.
Kyōtoku Incident happened in 1454.
Kyūjō Incident happened in 1945.
Rhamu Incident happened in 1977.
March Incident happened in 1931.
Baledrokadroka incident happened in 2006.
Matsue Incident happened in 1945.
Shimoyama incident happened in 1949.