English Stop the Invasion! Island Defense Reinforcement Operation[Edit]
Japanese 侵攻阻止!島嶼防衛強化作戦
Romaji Shinkō Soshi! Tōsho-bōē Kyōka sakusen
Start June 26th 2020 End August 27th 2020
Scale Large New Content 10 ships, 4 equipment, 11 abyssals
Maps 7 Maps (4 Main + 3 EO) Duration 8 weeks

Difficulty Selection[edit | edit source]

Each map in this event has four (4) difficulty levels (a.k.a. operation ranks) the player can choose from:

EventMedal-Casual.png
EventMedal-Easy.png
EventMedal-Normal.png
EventMedal-Hard.png

The operation rank affects enemy patterns, boss health and strength, the number of times the player has to sink the boss in order to clear the map and the drop rates of ships. Different ranks reward different medals, pieces of equipment and/or materials upon clearing a map. The higher the operation rank, the better the reward.

However, new ship rewards are available on all difficulty levels, and you only have to clear the final event map on Hard to get the exclusive First-class medal.

Click that option circled in as shown in red to change difficulty

You can choose the difficulty level for each individual map separately. However, you will NOT be able to select Hard for a map if you cleared the previous map on Casual/Easy. You must clear the previous map at least on Medium/Normal.

  • NOT POSSIBLECasual/Easy > Hard
  • POSSIBLE(Medium/Normal)/Hard > Hard
  • POSSIBLECasual/Easy/(Medium/Normal)/Hard > (Medium/Normal)
  • POSSIBLECasual/Easy/(Medium/Normal)/Hard > Casual/Easy

Un-highlighted words indicate Current Difficulty

It is also possible to change the difficulty level afterwards, however:

  • If you drop to a lower difficulty (e.g. from Hard to Normal/Easy), the current HP/TP bar value (the one you have the moment you drop down) will increase by 25% of the new maximum and you will retain ALL unlocking/phases done on the previous difficulty level.
  • However, if you change to a higher difficulty (e.g. from Easy to Hard), the boss's HP/TP bar will be reset upon doing so and ALL unlocking/debuffs/phases will be reset as well. In short, you will lose your entire map progress!

Once the map is cleared (boss HP bar is depleted, boss is defeated, and the HP bar is no longer visible in the map):

  • You CAN NO LONGER re-adjust the difficulty level, but can still farm the map on the difficulty you have chosen to clear the map with.
  • The enemy patterns revert back to pre-final patterns.

New[edit | edit source]

Ships[edit | edit source]

Usugumo Banner.png DD Usugumo E-1 Reward
Jingei Banner.png AS Jingei E-2 Drop
I-47 Banner.png SS I-47 E-3 Reward
Kaiboukan No.4 Banner.png DE Kaiboukan No.4 E-4 Drop
Matsu Banner.png DD Matsu E-4 Reward
Ariake Banner.png DD Ariake E-5 Drop
Helena Banner.png CL Helena E-5 Drop & E-6 Drop
Yashiro Banner.png DE Yashiro E-6 Drop & E-7 Drop
South Dakota Banner.png FBB South Dakota E-6 Reward
Hornet Banner.png CV Hornet E-7 Reward

Equipment[edit | edit source]

Late Model 53cm Bow Torpedo Mount (8 tubes) 383 Card.png Late Model 53cm Bow Torpedo Mount (8 tubes) Torpedo.png Submarine Torpedo ?
Late Model Submarine Radar & Passive Radiolocator 384 Card.png Late Model Submarine Radar & Passive Radiolocator Submarine Radar Icon.png Submarine Equipment ?
6inch Triple Rapid Fire Gun Mount Mk.16 386 Card.png 6inch Triple Rapid Fire Gun Mount Mk.16 RedGunMedium.png Medium Caliber Main Gun ?
6inch Triple Rapid Fire Gun Mount Mk.16 mod.2 387 Card.png 6inch Triple Rapid Fire Gun Mount Mk.16 mod.2 RedGunMedium.png Medium Caliber Main Gun ?

Abyssal[edit | edit source]

Units[edit | edit source]

Destroyer Na-Class Late Model Elite Banner.png
Destroyer Na-Class Late Model Flagship Banner.png
Destroyer Na-Class
  • 2 new forms
Abyssal Destroyer Various Encounters
Abyssal Kuriles Princess Banner.png
Abyssal Kuriles Princess Damaged Banner.png
Abyssal Kuriles Princess
  • 3 normal forms
  • 3 damaged forms
Abyssal Destroyer E-1 Boss
Supply Depot Princess B Summer Landing Mode Banner.png
Supply Depot Princess B Summer Landing Mode Damaged Banner.png
Supply Depot Princess B Summer Landing Mode
  • 3 normal forms
  • 3 damaged forms
Abyssal Aviation Battleship (Installation) E-2 1st Boss
Gotou Islands Seabed Princess Banner.png
Gotou Islands Seabed Princess Damaged Banner.png
Enemy Banner Gotou Islands Seabed Princess Damaged Debuffed.png
Gotou Islands Seabed Princess
  • 3 normal forms
  • 3 damaged forms
  • Can be debuffed
Abyssal Submarine E-3 Boss
Destroyer Forest Princess Banner.png
Destroyer Forest Princess Damaged Banner.png
Enemy Banner Destroyer Forest Princess Damaged Debuffed.png
Destroyer Forest Princess
  • 3 normal forms
  • 3 damaged forms
  • Can be debuffed
Abyssal Destroyer E-4 Final Boss
Heavy Cruiser Ne-Class Kai Summer Mode Banner.png Heavy Cruiser Ne-Class
  • 3 new "Kai Summer Mode" forms
  • 1 new "Kai B (II) Summer Mode" form
Abyssal Heavy Cruiser Various Encounters
Light Cruiser Princess Banner.png Light Cruiser Princess
  • 4 new "B (II)" forms
Abyssal Light Cruiser E-5 1st Boss
Aircraft Carrier Summer Princess Banner.png Aircraft Carrier Summer Princess
  • 3 new forms
  • 1 new "B (II)" form
Abyssal Standard Aircraft Carrier Various Encounters
In E-7
Submarine Summer Princess Flagship Banner.png Submarine Summer Princess Flagship
  • 2 new "B (II)" forms
Abyssal Submarine Various Encounters
In E-7
New Southern Battleship Princess Banner.png
New Southern Battleship Princess Damaged Banner.png
Enemy Banner New Southern Battleship Princess Damaged Debuffed.png
New Southern Battleship Princess
  • 3 normal forms
  • 3 damaged forms
  • Can be debuffed
Abyssal Fast Battleship E-6 Final Boss
South Pacific Aircraft Carrier Princess Banner.png
South Pacific Aircraft Carrier Princess Damaged Banner.png
Enemy Banner South Pacific Aircraft Carrier Princess Damaged Debuffed.png
South Pacific Aircraft Carrier Princess
  • 3 normal forms
  • 3 damaged forms
  • Can be debuffed
Abyssal Standard Aircraft Carrier E-7 Final Boss

Equipment[edit | edit source]

12.7cm Twin Gun Mount Model A Kai 2 294 Equipment.png Abyssal 5inch Twin Gun Mount Model A RedGunLight.png Small Caliber Main Gun Abyssal Kuriles Princess equipment
Late Model Submarine Radar & Passive Radiolocator 384 Equipment.png Abyssal Submarine Electronic Armament Submarine Radar Icon.png Submarine Equipment Gotou Islands Seabed Princess equipment
12.7cm Single High-angle Gun Mount Kai 2 379 Equipment.png Abyssal 5inch Single High-angle Gun Mount Kai Ni GreenGunDP.png Small Caliber Main Gun Destroyer Forest Princess equipment
12.7cm Twin High-angle Gun Mount Kai 2 380 Equipment.png Abyssal 5inch Twin High-angle Gun Mount Kai Ni GreenGunDP.png Small Caliber Main Gun Destroyer Forest Princess equipment
SK + SG Radar 279 Equipment.png Abyssal Night Operation Aviation Equipment Radar.png Large Radar Aircraft Carrier Summer Princess B equipment
16inch Triple Gun Mount Mk.6 381 Equipment.png Abyssal 16inch Triple Gun Mount Mk.6 RedGunMedium.png Medium Caliber Main Gun New Southern Battleship Princess equipment

Maps[edit | edit source]

Rainy-Summer 2020 Event Lock.png
Rainy-Summer 2020 Event E-1 Map.png Rainy-Summer 2020 Event E-2 Map.png Rainy-Summer 2020 Event E-3 Map.png Rainy-Summer 2020 Event E-4 Map.png Rainy-Summer 2020 Event E-5 Map.png Rainy-Summer 2020 Event E-6 Map.png Rainy-Summer 2020 Event E-7 Map.png
E-1 E-2 E-3 E-4 E-5 E-6 E-7
Teal Tag Orange Tag Blue Tag Green Tag Purple Tag Yellow Tag Gray Tags 1+2+3
(HARD-only)
Single Fleet Combined Fleet Single Fleet
Combined Fleet
Single Fleet
Combined Fleet
Single Fleet
Combined Fleet
Combined Fleet Single Fleet
Combined Fleet
TP + HP Gauge HP + HP Gauge HP Gauge TP + TP + HP Gauge HP + TP Gauge HP + HP Gauge HP + HP + HP Gauge
LBAS LBAS LBAS LBAS LBAS LBAS
Click on image of each map to jump to respective subpage directly if you don't want to use tab

Quick Notes[edit | edit source]

Event Drops[edit | edit source]

[Edit] Press [Expand] to see the table, or [Edit] to edit it

☑ Showing old data ☒ Show old data (hidden)

Legend: R = Reward, D = Drop, Empty = not implemented yet/not yet know, N = not found (after implement)
Exclusive Ships
2014
2015 Events 2016 Events 2017 Events 2018 Events 2019 Events 2020 Events
Portrait
Name
Akizuki
Akizuki
R N N N D D D D D N D D D D N N D N D N D N
Prinz Eugen
Prinz Eugen
R N N N D D N D D N N D N N D N N N N N N D
U-511
U-511
R D D D N D N N D N D N N N N N D N N D D
Amagi
Amagi
R N N N D D D D N D D N N N N N N D N N N
Katsuragi
Katsuragi
R N N N N D N N N N D D N N D N N N N N
Littorio
Littorio
R N N N D N N N D D N N D N N D N N N D
Roma
Roma
D D D N D N N N D D N N D N N D N N N N
Teruzuki
Teruzuki
R N N D N N D N D D N N D D N D N D N
Graf Zeppelin
Graf Zeppelin
D D D N N N N D N D D N N N N N D D
Hatsuzuki
Hatsuzuki
R N N D N N N N N D N N N D N D D
Iowa
Iowa
R N N N N N N D N N D N N N N N
Pola
Pola
R N D N N D N N D N N D N N N N
Harukaze
Harukaze
D N D D D D D D N N N N D N N D
Aquila
Aquila
D N N N D N N D N N D N N N D
I-26
I-26
D N D N N N N D N N D D N D N
Commandant Teste
Commandant Teste
R N N D N N D N D D N N N D
Matsukaze
Matsukaze
R N N N D D N N N D N D D
I-14
I-14
R N N N N D N N N N N D N
I-13
I-13
D D N N N D N N N D N D N
Kasuga Maru
Kasuga Maru
R N D D D D D N D N D D
Gangut
Gangut
R N N D N N D N N N D D
Shimushu
Shimushu
D N D D D D D N N N D D
Kunashiri
Kunashiri
D N D D D D D N D N D N
Etorofu
Etorofu
D D D D D D D D D D D N
Hatakaze
Hatakaze
R N D N N N N D N D D
Richelieu
Richelieu
R N D D N N D N D N D
Luigi Torelli
Luigi Torelli
D N D D N D D N N D D
Matsuwa
Matsuwa
D D D D N D N D D D D
Suzutsuki
Suzutsuki
R N N D D N N N D N
Sado
Sado
R D D N D D D D D D
Tsushima
Tsushima
D D D D D D D D D D
I-400
I-400
D N D N D N N N D N
Gambier Bay
Gambier Bay
R N N D N N D D D
Intrepid
Intrepid
R N N D N N N N N
Hiburi
Hiburi
R D D D D D N D D
Daitou
Daitou
D D D D D D N D D
Jervis
Jervis
D N N N D N N N D
Hamanami
Hamanami
D N D D D D D D D
Tashkent
Tashkent
D N N D D N N D D
Samuel B. Roberts
Samuel B. Roberts[EDT 1]
N N D N N D N N
Fukae
Fukae[EDT 2]
D D D D D D D N
Shinyou
Shinyou
R N D D D N D D
Maestrale
Maestrale
R N N D N N N N
Nelson
Nelson
R N N D N N N D
Gotland
Gotland
D D D D N D N D
Minegumo
Minegumo
R N D D D D N
Nisshin
Nisshin
R N N N N D N
Hayanami
Hayanami
D D D D D D D
Johnston
Johnston
D D D N N D N
Giuseppe Garibaldi
Giuseppe Garibaldi
R N N N N D
Colorado
Colorado
R N N N N D
Hachijou
Hachijou
R N D N D N
Ishigaki
Ishigaki
D N D N D N
Fletcher
Fletcher
D N D N D N
Duca degli Abruzzi
Duca degli Abruzzi
R N N N N
Janus
Janus
R N N N D
Mikura
Mikura
D D N D N
Grecale
Grecale
D N N N D
Perth
Perth
R N D D
Shinshuu Maru
Shinshuu Maru
R N N D
Atlanta
Atlanta
R N N N
De Ruyter
De Ruyter
D N D N
Houston
Houston
D N D N
Hirato
Hirato
D D D N
Akishimo
Akishimo
D N D N
Usugumo
Usugumo
R N
I-47
I-47
R N
Matsu
Matsu
R N
South Dakota
South Dakota
R N
Hornet
Hornet
R N
Jingei
Jingei
D D
Kaiboukan No.4
Kaiboukan No.4
D D
Ariake
Ariake
D N
Helena
Helena
D N
Yashiro
Yashiro
D N
Washington
Washington
R
Take
Take
R
Scirocco
Scirocco
D
Sheffield
Sheffield
D
Portrait
Name
Exclusive Ships
2014
2015 Events 2016 Events 2017 Events 2018 Events 2019 Events 2020 Events
This table includes all ships that are currently unavailable outside of events.
  1. Samuel B. Roberts introduced as a quest reward from 5A05 during the Kancolle 5th Anniversary
  2. Fukae introduced as drop in (Phase 1) 2-4 & 6-3 during Spring 2018 Mini-Event
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