Kinda the Oldest

1943-01-18: I-400 laid down at Kure 1943-02-04: I-13 laid down at Kobe 1943-04-26: I-401 laid down at Sasebo 1943-05-18: I-14 laid down at Kobe

1943-11-30: I-13 launched 1944-01-18: I-400 launched 1944-03-11: I-401 launched 1944-03-14: I-14 launched

1944-12-16: I-13 completed, departs Kobe 1944-12-17: I-13 arrives at Kure, begins training 1944-12-30: I-400 completed, begins training

1944-12-31: Submarine Division 1 formed Ships join one-by-one and begin training

1945-01-8: I-401 completed, departs Sasebo, begins training 1945-03-14: I-14 completed, departs Kobe 1945-03-15: I-14 docks at Kure, begins training 1945-04-11: I-401 departs Kure 1945-04-12: I-401 hits a mine, returns to Kure for repairs 1945-04-14: I-400 departs Kure 1945-04-20: I-400 docks at Dalian 1945-04-23: I-400 departs Dalian 1945-04-27: I-400 docks at Kure 1945-05-27: I-13 and I-14 depart Kure (This is the date of I-14's shipboard drinking party incident) 1945-05-28: I-13 and I-14 docks at Jinhae 1945-05-29: I-13 and I-14 departs Jinhae 1945-06-01: I-13 and I-14 docks in Nanao Gulf, I-401 departs Kure 1945-06-02: I-400 departs Kure 1945-06-04: I-401 docks in Nanao Gulf 1945-06-05: I-400 docks in Nanao Gulf 1945-06-20: I-13 and I-14 depart Nanao Gulf 1945-06-22: I-13 and I-14 dock in Maizuru

1945-06-25: Top Secret Signal No. 251330 Operation Hikari: Transporting Saiun to Truk (I-13, I-14) Operation Arashi: Ulithi Surprise Attack (I-400, I-401)

1945-07-02: I-13 and I-14 depart Maizuru 1945-07-04: I-13 and I-14 dock at Ouminato 1945-07-11: I-13 departs Ouminato 1945-07-13: I-400 and I-401 depart Nanao Gulf, dock at Maizuru 1945-07-14: I-14 departs Ouminato 1945-07-16: I-13 sinks 1945-07-20: I-400 and I-401 depart Maizuru 1945-07-21: I-401 docks at Oouminato 1945-07-22: I-400 docks at Ouminato 1945-07-23: I-400 and I-401 depart Ouminato 1945-08-04: I-14 docks at Truk 1945-08-15: War ends