archytele The Vault
Season guide

Decision: Season 1

25 episodes Premiered Apr 3, 1971 Updated Oct 26, 2026
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Season 1 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 1 Progress Shield

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Season 1: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

32%
68%
Mytharc (8): Crucial lore & season climaxes
Core (17): Character development & subplots
Side Quest (0): Standalone / filler
S1·E1 Mytharc

Surprise Attack on Pearl Harbor

Apr 3, 1971 · 25 min

At 6:05 on December 8, 1941, the first attack squadron, a total of 350 aircraft, 765 men, departed for Pearl Harbor, ushering in a new phase of the war. Vice Admiral Nagumo, comman

S1·E2 Mytharc

Battle of Midway (Part 1)

Apr 10, 1971 · 25 min

As the Japanese military continues to advance in the Indian Ocean, they draw up the Midway operation plan with the goal of blocking the US Navy's mobile operations and destroying t

S1·E3 Mytharc

The Battle of Midway (Part 2)

Apr 17, 1971 · 25 min

The Japanese Navy lost three main aircraft carriers, Akagi, Kaga, and Soryu. The remaining Hiryu launches a final battle against three US aircraft carriers. Japanese aircraft also

S1·E4 Core

Malay Blitz Operation

Apr 24, 1971 · 25 min

The Japanese army, advancing south to secure resources, landed on the Malay Peninsula with the aim of taking Singapore, the base of the British army, by land. In the early hours of

S1·E5 Core

Singapore Attack

May 1, 1971 · 25 min

Japanese soldiers are exhausted from the rush from the Malay Peninsula landing, and the Japanese army does not have enough ammunition. How will General Yamashita take Singapore? Th

S1·E6 Core

Raid on Hong Kong

May 8, 1971 · 25 min

Under the banner of Lieutenant General Sakai, commander of the 23rd Army, following the landing on the Malay Peninsula, 12,000 troops will attack the defended British territory of

S1·E7 Core

Battle of Malaya

May 15, 1971 · 25 min

The British Eastern Fleet joins the battleship Prince of Wales and the battlecruiser Repulse, and the British forces in Singapore enter an impregnable defense. After receiving info

S1·E8 Core

Coral Sea Battle

May 22, 1971 · 25 min

The first battle between aircraft carriers in naval history. One-on-one battle between Zero Fighter and Grumman, which are each carrier-based aircraft. In support of the Port Mores

S1·E9 Core

Episode 9

May 29, 1971 · 25 min

S1·E10 Core

Naval Parachute Corps

Jun 5, 1971 · 25 min

Operation Celebes Island capture. Operation by the Japanese army's first parachute unit. An unknown strategy for the Japanese army. A parachutist who was praised as a hero in the s

S1·E11 Core

Bataan and Corregidor Attack

Jun 12, 1971 · 25 min

The Japanese army goes to capture the Philippines, which is under the control of the United States. Judging the results of the Japanese army, General MacArthur abandoned the Philip

S1·E12 Core

Submarine I-168

Jun 19, 1971 · 25 min

I-168 sortieed to finish off Yorktown, which was severely damaged in the Battle of Midway. Can you really discover Yorktown in the wide ocean and sink it? The sinking of Yorktown i

S1·E13 Core

First Battle of the Solomons

Jun 26, 1971 · 25 min

With the momentum of the victory in the Battle of Midway, the American forces raised the signal of a counterattack against the Japanese forces. However, the US military is also und

S1·E14 Core

Colonel Kato's Falcon Air Squadron

Jul 3, 1971 · 25 min

A military fighter "Hayabusa" (falcon) was developed to keep up with fighters from other countries. It was Major Takeo Kato who led the "Hayabusa Fighter Corps" with high-performan

S1·E15 Core

Rabaul Air Squadron

Jul 10, 1971 · 25 min

After the withdrawal from Guadalcanal, Rabaul was the last stronghold to defend the southern regions. However, air superiority is already in the Allies. Aiming to cut off the suppl

S1·E16 Core

Withdraw from Kiska Island

Jul 17, 1971 · 25 min

In order to stop the US task force's advance from the north, the Japanese army carried out Operation Aleutian and marched to Attu and Kiska islands. However, the U.S. forces counte

S1·E17 Core

Birth of Kamikaze

Jul 24, 1971 · 25 min

Sea control of the western Pacific was completely transferred to the U.S. military. In the early hours of October 18, 1944, Operation Sho Ichigo was launched to attack the US fleet

S1·E18 Mytharc

Death of Isoroku Yamamoto

Jul 31, 1971 · 25 min

Isoroku Yamamoto, Commander of the Combined Fleet, goes to Bougainville to inspect the front lines in order to boost the morale of the Southern Army, which is repeatedly fighting f

S1·E19 Core

Battle of Lunga

Aug 7, 1971 · 25 min

In order to supply Guadalcanal as well, the Japanese army carries out a drum can operation with destroyers. As the U.S. forces furiously intercept the fleet, Rear Admiral Raizou Ta

S1·E20 Core

Battle of the Mariana Islands

Aug 14, 1971 · 25 min

After the withdrawal of Japanese forces from Guadalcanal, the completion of the B29 enabled the US military to carry out air raids on the mainland of Japan. It was necessary to cap

S1·E21 Mytharc

Battle of Leyte Gulf (Part 1)

Aug 21, 1971 · 25 min

Battleship Musashi sorties as a ship in charge of damage. Each commander was obsessed with the specter of a decisive fleet battle, and Captain Musashi, who received a decisive air

S1·E22 Mytharc

Battle of Leyte Gulf (Part 2)

Aug 28, 1971 · 25 min

In order to destroy the landing force and the transport fleet led by Gen. MacArthur, the Japanese army carries out a large-scale revival operation. Using the riot squad led by Lieu

S1·E23 Core

Operation Iwo Jima

Sep 4, 1971 · 25 min

The US military was considering dispatching fighter planes to support the bombing of the Japanese mainland by B-29s. Iwo Jima was the only fighter base. When the mainland bombing o

S1·E24 Mytharc

The End of the Combined Fleet

Sep 11, 1971 · 25 min

"Aiming to become a divine machine commander, the empire's rise to prosperity is here in one fell swoop. Each member must fight valiantly to destroy all enemies, and demonstrate th

S1·E25 Mytharc

The Last Decision

Sep 18, 1971 · 25 min

On July 27, 1945, the Potsdam Declaration was announced. Atomic bombs are dropped on Hiroshima and Nagasaki against Japan, which is at the end of the war. What kind of determinatio

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