Spies generally hide among civilians in disguise, which is like a mouse hiding underground, so they are generally called "moles".

The danger brought by enemy spies is very great, even more than the danger of an enemy army, and often a piece of important information can bury an army and even change the fate of a country. The various international treaties signed before and after the First Global War to protect the military personnel of the two warring parties did not contain protective provisions for spies, that is, spies operating in enemy countries were not protected by any international treaties, and almost all of them were executed when they were caught. Espionage is bound to be a high-risk, but also high-reward, hostile activity. Especially in war, each side wants to be able to obtain as much information as possible from the enemy, but at the same time, it must try to protect its own intelligence and eradicate the enemy's spies. Therefore, intelligence work is divided into two types: one is to collect, spy on, and seize the enemy's intelligence. The second is to crack down on the enemy's spies and internal traitors to protect their own intelligence.

Every country has its own specialized intelligence agencies, and often has several sets of intelligence agencies at the same time. As intelligence collection and counterintelligence work become more and more specialized, it is necessary to set up a separate intelligence department and train professional intelligence and counterintelligence personnel.

In the beginning, the military intelligence system of the Tang Empire was directly under the responsibility of the soldiers, especially the foreign legions were responsible for collecting local intelligence. Later, both the army and navy of the empire set up separate intelligence agencies, and invested heavily in training professional intelligence officers. Then.

The main job of the intelligence agencies of the army and navy is to collect military intelligence from other countries, including friendly countries. By the time of the outbreak of the Great War, the Imperial Government had integrated Army Intelligence with Naval Intelligence.

The Imperial Military Intelligence Directorate was established and was directly subordinate to the Cabinet. Leaders are appointed directly by the Prime Minister and are directly accountable to the Prime Minister. In the early days of the Intelligence Bureau, the Empire's intelligence system was rather chaotic. It was only after the United States entered the war that the intelligence system of the empire gradually recovered and played an active role in the war. It was of great help to the Empire's naval and land armies.

Tan Renhao is not an intelligence officer, and he has only received the most basic counterintelligence study, that is, the military's secrecy study. When he returned to Moroni, he immediately went to Jiang Zhongmin's headquarters and asked Zheng Guanhua to rush over immediately after arranging the supply of the fleet.

The Third Task Force arrived at Moroni a few hours earlier, and by the time Tan Renhao arrived at Jiang Zhongmin's temporary headquarters, Chang Jiexin had already arrived first. After the three of them exchanged greetings, Prime Minister Chang Jianxin gave a general account of the operations of the Third Task Force, and then Jiang Zhongmin also told him about the search of the seaplanes he had deployed. Finally, Tan Renhao gave a general account of the combat attack of the First Task Force. After the three of them finished talking about their respective actions, Zheng Guanhua and Gu Zhenyun also arrived.

"There's one very important thing. I didn't mention it in Telegram. It was only at this time that Tan Renhao said what he was most concerned about and worried about, "Judging from the series of actions of the Anglo-French joint expeditionary fleet, we can conclude one point. That is, Cunningham received a lot of accurate information. ”

"That's for sure, our intelligence services have arrested several British and French spies in Colombo, but they are using a one-line, one-way approach, so there is no way to further expand the search area. With hundreds of thousands of inhabitants in Colombo and millions in Ceylon, it is almost impossible to conduct a comprehensive census and eliminate enemy espionage. Jiang Zhongmin sighed, "I have proposed to the intelligence leaders here many times to strengthen their counter-espionage work, but the results are not great, even if the whole city is under martial law, it will only be effective in two or three days." ”

"We can't solve the problem of Colombo, but Cunningham has obtained more information than just Colombo!"

Chang recommended the new, Jiang Zhongmin and the others immediately looked at Tan Renhao in surprise. Tan Renhao hesitated slightly, and then said what he had in mind.

"The most important thing is that Cunningham must know the situation on Moroney's side, otherwise, his actions will not make sense!"

"I also think so, there is no reason for the Anglo-French joint expeditionary fleet to resupply at the mouth of the Mango River, there are several sheltered bays to the south of the island of Madagascar, and they can do so in the south!" Chang Jianxin was the first to stand on Ren Hao's side, "Ren Hao's analysis is reasonable, there must be British and French spies on Moroni's side, and the information was sent out in a very timely manner!" ”

Jiang Zhongmin nodded slightly, and he basically agreed with Tan Renhao's analysis.

"The fleet will not return to Colombo for the time being, so the danger of enemy spies on the Colombo side is quite limited, but Moroni is our forward base and the support point for the fleet's activities."

Tan Renhao gritted his teeth, "If we can't eradicate the enemy spies here, then the whereabouts of the fleet will be exposed under the enemy's nose, and we will definitely be defeated by Cunningham." This time it was lucky, Task Force 3 escaped, and if there was a next time, maybe it wouldn't be so lucky. ”

"Then I will immediately send a telegram to Colombo and immediately arrange for a group of intelligence officers to come over and ......"

"No, we can't rule out the possibility of a 'mole' in our intelligence system."

Tan Renhao interrupted Jiang Zhongmin's words, "There are only a few thousand people in Moroni, and there are only more than 10,000 inhabitants on the island of Greater Comore. Now, we can't even rule out the possibility of 'moles' within the army, so the investigation can only be done by ourselves. ”

"But the problem is, the five of us can't do it at all!" Chang Jianxin looked at Tan Renhao with a little surprise.

"It's not just the five of us, but we have to find someone we can trust to help." Tan Renhao glanced at the other four people, "We can send officers who have served in the fleet headquarters for more than three years, as well as captains and senior officers on major warships to assist in the investigation.

All of these officers have received some secrecy training, and all have served in the Navy for more than several years. Their suspicion is the least and the most reliable. Also, Zhongmin. There should also be a group of similar officers in your unit that can organize these people. ”

"That's fine. The officers of the Fifth Task Force Command are here, and I can select a group of absolutely reliable people to assist in the investigation. ”

"There are hundreds of these officers, and a small investigation should be enough." Tan Renhao sighed, "The biggest problem is that we have to think of an ingenious solution. Lure out enemy spies hiding in Moroni, and locate them, arrest them, or at least monitor them! ”

Everyone fell silent, and this was the trickiest solution. The five generals are all very powerful characters on the battlefield, but now they have to deal with not a powerful enemy fleet, but those enemy spies hidden in the civilian population and even the army, which is not their forte.

"Talking about the general, I have thought of a way." Zheng Guanhua broke the silence.

The eyes of all four immediately turned to him.

"Judging by the analysis of General Tan. Cunningham should have known that we had captured Moroni, and therefore, it was our Marines who had captured Moroni. The message was sent. ”

Zheng Guanhua spoke very slowly, "During this time, in addition to our ships, are there any other ships that have left Moroni?" ”

"Probably not. Our destroyers have been operating near the island, and after we captured Moroni, all ships on this side were forbidden to go to sea. Jiang Zhongmin answered Zheng Guanhua's question, "If there is a ship going to sea, then our destroyer will definitely intercept it and report back to me." ”

"Then, it is impossible for enemy spies to send information out by ordinary means, and the only way they can send intelligence is through the radio!" Zheng Guanhua paused slightly, "Therefore, we can judge the approximate location of the enemy spy personnel by listening to the activity of the radio signal." ”

"But the problem is, we don't have a dedicated monitoring station for counter-espionage agencies here!"

"There's on the battleship." Tan Renhao added next to him.

"But......" Jiang Zhongmin hesitated for a moment, did not say the following words, but looked at Zheng Guanhua.

"It is impossible for enemy spies to use long-wave radios, after all, the antennas of long-wave radios are too obvious. As a result, they can only use shortwave radios, which can only communicate at most a few hundred kilometers. Zheng Guanhua saw the surprised eyes of the four, "I used to study aeronautical communications, so I have some understanding of this knowledge. ”

Only then did everyone understand that this time they had found an "expert".

"Well, somewhere nearby, there must be a relay station!" Tan Renhao first followed Zheng Guanhua's analytical ideas and thought about it.

"The relay station may be located on the African continent, on the island of Madagascar, or on one of the other islands. And it is almost impossible to find the exact location of the enemy's relay station in such a large area, and even if it is found, it is impossible for our troops to arrive in time. Zheng Guanhua glanced at Tan Renhao, and then said, "Then, the only way for us is to find the signal emission source here." ”

"With the radio detection system on the battleship?" Chang Jianxin was surprised.

"Yes, the radio detection system on the battleship is designed for short-wave radio stations, as well as radar wave signals, so it is very sensitive to short-wave signals, and there are direction finding devices. In fact, the radio direction finding device is not complicated, we can deploy several such warships around the island, every three warships as a group, deploy several more groups of such warships, then we can determine a specific position through the cross-operation algorithm. ”

"Isn't two warships enough?" Gu Zhenyun spoke at this time.

"It's more accurate to use three pieces of data, and it's better to cross-compare with several sets of data."

"But it's not enough to have warships, we also have to have a listening radio on the ground."

"Yes, we can modify a batch of radio stations temporarily, as long as we have the relevant tools, I will do this." Zheng Guanhua hesitated slightly, "Find a few communications officers to be responsible for cooperating with me, and I can modify three radio stations today." Then, we set up these three stations in each of the three directions of the island, and combined with the detection devices on the battleship, we can calculate the approximate range of signal sources. ”

"How accurate can it be?" Tan Renhao directly asked the most critical and important question.

"It depends on the situation, but in this kind of short-range detection, and if you use more than three sets of data for comparative analysis, you should be able to determine a relatively accurate range, and the error will not exceed 200 meters in the area of the Great Comoros."

Tan Renhao nodded slightly, and then pondered.

"But the problem is that we have very few counter-espionage personnel at our disposal, and we must first determine a general location, so that our personnel can be deployed in place, and then determine the precise location." Jiang Zhongmin raised another key question.

"So, we have to have the enemy spy send the signal twice." Zheng Guanhua shrugged his shoulders after speaking.

"This method is generally feasible, but what can we do to get the enemy spy to send two telegrams at intervals?" Tan Renhao looked at everyone.

"There is another point that we can't ignore, Cunningham must have recognized that his plan has been exposed, so he will definitely let the spy personnel lurk, without major information, these spy personnel will not send a telegram at all!" Chang Jianxin mentioned another key point at this time.

"Therefore, we must create important enough information to force the enemy spy to send information!" Tan Renhao gritted his teeth, "Judging from the current situation, the most important thing is to find the radio station of the enemy spy personnel, as long as the radio station is captured, those spy personnel will not be able to send out the news at all!" ”

"Then we have to think about what kind of intelligence is important enough for those hidden spies to turn on the radio again!" Jiang Zhongmin also sighed, anti-espionage operations are not their strong point.

The five of them pondered, and finally, they all thought of a key point, that is, the intelligence spied by the enemy spy personnel was related to the fleet, so the activities of the fleet must be the focus of the enemy spy personnel, and this must be enough to make those spy personnel active!