Admiral Isoroku Yamamoto, commander of Japan's Combined Fleet, was preparing to lead his tiger and wolf division across the Pacific to attack the United States' Pearl Harbor on Hawaii's Oahu, while in Washington, the Japanese delegation was still negotiating with American representatives in a pretending manner.

From Washington to Pearl Harbor, there seems to be no sign of war, and no one in the United States and China, across the ocean, seems to notice the slightest smell of war in the skies over the Pacific Ocean.

In fact, Li Ran and Bai Yu in Caijiazhou were already sensitively aware of the Japanese army's movements.

The work of the firing group has finally improved a little in the recent period, because they have faintly sensed from the telegrams they have heard from the Japanese army that the devils are going to have a very important military operation in the near future.

From the large number of telegrams intercepted by the Japanese army, the words "east," "south," and "rain," which frequently appeared some time ago, have suddenly disappeared from the various telegrams of the Japanese army in the past few days, and have been replaced by words such as "alert" and "guard."

Based on their previous experience in deciphering and intercepting Japanese military telegrams, Li Ran and his men felt from experience that the devils must have some conspiracy activities, so in order to cover up some of their attempts, they deliberately concealed some of their past practices, making people seem to think that everything was normal.

As a result, the intelligence group did not dare to slack off for a moment, and they immediately reported the recently intercepted Japanese intelligence and their own judgment to the theater command. After analyzing the matter, the Theater Commander's Department reported the unusual situation to the Supreme Military Council. The highest authorities forwarded their report to Chi Buzhou, the "black room of China".

In fact, Chi Buzhou and his colleagues have also noticed the abnormal actions of the Japanese army, from the intelligence about the "East" that frequently appeared in the Japanese army some time ago, to the sudden disappearance in recent days. It was as if Hawaii, which had been so much of a concern for the past, had suddenly become worthless. This is not the practice of stubborn and cunning devils, there must be some conspiracy in it.

Chi Buzhou clearly remembers that not long ago, in October, the Japanese Ministry of Foreign Affairs suddenly ordered all Japanese embassies and consulates in the southwest and Pacific regions, including the Philippines, Vietnam, Thailand, Burma, Malaysia, Indonesia, Singapore, and other islands, to burn all but the simplest code books. At the same time, in the telegrams sent to various places, many hidden code names frequently appeared, such as: "West Wind Tight" means "tense relations with the United States", "Northern Sunny" means "ease of relations with the Soviet Union", "There is rain in the southeast" means "tight on the battlefield with China", and so on. After investigation, it turned out that it meant "evacuating overseas Chinese" and that the Japanese Government had requested that the Japanese government would withdraw its Japanese nationals from the above-mentioned Southeast Asian countries. The Japanese Ministry of Foreign Affairs' telegram also clearly stipulates that these code codes will be broadcast by radio broadcasters when necessary, and all embassies and consulates are required to listen to them at all times.

When Chi Buzhou and the others deciphered these secret telegrams, judging from the current situation, there were only two understandings. First, the Japanese army is about to advance southward, and it is imminent. Another bold speculation is that the Japanese army will enter a state of war with the United States.

When Chi Buzhou received the information from the Ninth War Zone, he felt that his opinion was more correct. However, it is not possible to report to the Supreme Council that the Japanese army is about to attack the United States on the basis of just a few telegrams that have been obtained. A clear message should be given to the highest authorities, and there must be conclusive evidence.

Chi Buzhou immediately demanded that the intelligence teams and personnel lurking in various places, especially those in Shanghai, Guangzhou, Hong Kong, and other places, monitor the movements of the Japanese army 24 hours a day and report the movements of the Japanese army at any time.

At 6 a.m. on 26 November, Admiral Isoroku Yamamoto, commander of the Japanese Combined Fleet, issued an order requiring the Nagumo Mobile Force to immediately lift anchor and leave the port.

The Japanese mobile fleet, led by three submarines, quietly sailed through the rough waters of the North Pacific, and sailed very secretly to the standby sea at 42°N and 170°W, where they would wait for the final order to attack.

At this time, in Washington, the capital of the United States, the negotiations between Japan and the United States were still going on in disguise. Diplomats in Japan and the United States are still arguing about their own interests, and they are blushing and arguing.

At the same time, the Japanese military sent a large number of warships and warplanes to operate on the Japanese mainland, simulated a large-scale aircraft carrier formation, and frequently conducted radio contact in order to give the United States the illusion that "its main fleet is still operating on the mainland."

The Japanese mobile fleet, led by Vice Admiral Nagumo, who sailed in the vast Pacific Ocean, maintained radio silence and made a roundabout eastward route along a predetermined northbound course to avoid American patrol planes and merchant ships. The voyage of the huge Japanese fleet went unexpectedly smoothly, and for several days, thick clouds covered the Pacific Ocean, like a natural curtain covering the movements of the huge fleet. There are no rough waves on the surface of the sea, which are often set up in winter, and the speed of the voyage is unusually fast.

On December 2, just as Nagumo's mobile force had just crossed the East-West Longitude Date Line and entered the West-Longitude Sea north of Midway, Yamamoto sent a secret order to Nagumo with a new code: "Climb the New Peak 1208", which meant to launch an attack on December 8 (December 7, Hawaii time) as originally planned. Nagumo immediately ordered the captains of the ships to turn off their lights and drive away, and conveyed the "Z Operation" operation to all officers and men. Be ready for battle at all times.

Chongqing, the "Black Room of China". Chi Buzhou was already asleep on the marching bed and clothes in the cold office, and he was sleeping sweetly, snoring heavily from time to time.

Chi Buzhou was indeed too tired, and he hadn't had a full night's sleep for many days. Recently, he and his comrades-in-arms have been listening to Japanese telegrams day and night in accordance with the orders of their superiors, especially those telegrams related to Pearl Harbor in the United States, and all the people in the intelligence room have been deciphering and analyzing these intercepted Japanese telegrams day and night.

Suddenly, a hurried footstep came to the door:

"Director of the report, there is important information about the Japanese army."

Chi Buzhou jumped up from the bed excitedly, walked over, and asked very hurriedly:

"Is it intelligence about Pearl Harbor?"

The staff officer nodded and replied:

"Yes, Director."

Chi Buzhou hurriedly took the information handed over by the staff officer, sat down at the desk and carefully deciphered it. After deciphering it, he couldn't help but be overjoyed, jumped up excitedly, he took the telegram, circled around the room, and couldn't help laughing.

The second monk of the staff officer standing on the side was puzzled and asked suspiciously:

"Director, is Japan going to fight the Yankees?"

"Yes, the Japanese devils who don't know whether they are alive or dead are about to fight with the United States. It's really 'heaven has a way you don't go.'" Hell has no door, you're here'. The devil is going to die. Hahaha-"

Chi Buzhou immediately sat down and hurriedly buried his head in writing down the information in his hand. The telegram is a special classified telegram sent by the Japanese Ministry of Foreign Affairs to Nomura, the Japanese ambassador to the United States, and the telegram reads as follows:

"Nomura-kun: Please follow the following requirements of the base camp immediately:

1. Immediately burn all kinds of codebooks, leaving only one ordinary codebook, and burn all confidential documents at the same time.

2Inform the depositor concerned as far as possible to transfer the deposit to a neutral national bank.

3. The Imperial Government decided to act in accordance with the resolutions of the Imperial Council.

Remember! Hope to follow suit! ”

Chi Buzhou combined with the military intelligence about Honolulu that he had deciphered earlier, and he deduced that Japan and the United States were about to go to war. He also made a detailed analysis of the situation of the war and came to the conclusion that it was very likely that the Japanese army would start a war against the United States on Sunday, and the location of the attack was probably Pearl Harbor, where the US Pacific Fleet on Hawaii's island of Oahu was located.

Chi Buzhou personally wrote a report on the translated telegram combined with his own analysis, personally gave it to his boss Huo Shizi, and talked about his judgment in detail. Huo Shizi immediately put pen to paper and signed the opinion:

"Check the secret telegram sent by the Japanese ambassador to China to the Japanese consulates in China on the eve of 'August 13'. At that time, the secret telegram ordered all consulates in China to immediately burn all kinds of cipher codes and telegram books, indicating that the Japanese had decided to launch an all-out war against China. Now, the Japanese Ministry of Foreign Affairs has similarly ordered the Japanese Embassy in the United States to immediately burn all kinds of cipher code books. Based on this, it can be judged that Japan is about to start a war against the United States. It will probably be on Sunday, December 8th. ”

Huo Shizi then reported the situation to the Supreme Military Commission, and the highest Chinese authorities immediately informed the US envoy in Chongqing of this important and urgent information, and through the envoy, asked him to immediately transmit the information to the US military authorities. It is a pity that the US authorities are still intoxicated with negotiations with the Japanese delegation and do not pay any attention to the information sent by the Chinese authorities. Although the Chinese intelligence department sent information one after another and informed the Japanese army of the exact time of the attack, it still did not attract the attention of the US authorities.

On December 3, the same day that Chi Buzhou intercepted the Japanese telegram, after receiving Yamamoto's order, Nagumo's mobile force, which was already on standby in the Pacific Ocean, immediately turned to the southeast.

Three days later, on December 6, the Japanese fleet supply tankers filled each warship and the aircraft on the aircraft carrier for the last time, and then turned around and left the formation to return home. The rest of the combat ships of the Mobile Fleet then turned to sail, increasing their speed to 24 knots, and traveled at high speed due south, soon approaching Pearl Harbor, the home port of the U.S. Pacific Fleet.

At dawn on December 8 (December 7, Hawaiian time), Nagumo's mobile force arrived about 230 nautical miles north of Pearl Harbor on time. The aircraft carriers and other ships began to change course and head northward against the wind. Nagumo's flagship aircraft carrier, the Akagi, raised the bright red "Z" flag, and on the aircraft carrier, the plane's engines were activated, and the ground crew filled the plane with fuel and ammunition.

Outside Pearl Harbor, a Japanese miniature submarine lurking not far away raised its periscope.