At the root of it, it's all about funding.

After the implementation of all-out war mobilization, it becomes a question of industrial productivity.

The strength of a country's industrial productive forces has nothing to do with the wishes of its generals, nor is it in any way influenced by the personal will of its leaders.

Although affected by the overall situation, such as the temporary lack of the ability of the Bran Kingdom to launch a strategic counterattack, the possibility of a large-scale ground war with the Entente bloc, and the relatively low demand for the army, the huge loss of sea transportation still caused great pressure on the Newland Federation, and indirectly affected the construction of warships, making it impossible for the Nuland Navy to obtain all the ships it wanted.

Even if Nitsu came forward in person, it would have to be prioritized.

Lofos did not emphasize the issue, and there is no need to emphasize it.

Don't forget that during the last war, Lofus was Assistant Secretary of the Navy in the Wilkins administration, where he was primarily responsible for the construction of naval equipment.

In Lofus's words, during the Great War, it is even more important to do what you can.

Of course, there are more immediate reasons.

Just a few days ago, a fleet of ships bound for the Luosha Federation was ambushed in the North Sunset Ocean, and a total of 17 10,000-ton ships were sunk by the submarine Zoman.

This is the third flotilla to be attacked by a submarine over the North Sunset Ocean this month.

Including this time, the total tonnage of transport ships lost on the North Sunset Ocean Route this month has already exceeded 700,000 tons, and it may eventually reach 1 million tons.

If so, it will be the most costly month since the war began.

As for the reasons, there must be many.

First of all, the Manman Navy adjusted its tactics of breaking diplomatic relations.

According to reliable information, just last month, the Emperor personally put on the rank of admiral for Dunz, appointed him commander-in-chief of the submarine force, set the submarine force as an independent branch of the army, and granted him a high degree of autonomous decision-making power, and was fully responsible for the combat operation of breaking diplomatic relations in the northern Fanyan Ocean.

Although this move also means that the Manman Navy will no longer arrange large warships to carry out the task of breaking diplomatic relations, it is also equivalent to liberating the submarine force.

Shortly thereafter, the submarine adjusted its tactics of breaking the diplomatic relationship.

To put it simply, it's actually a point.

Move from a single activity to a cluster activity.

This set of tactics is not complicated to say.

The first thing any submarine should do after discovering the enemy's convoy is not to attack, but to track and monitor the convoy and report the situation by telegram. Based on the reports received, the Submarine Command will give orders to other submarines operating in the vicinity and select the most favorable ambush site so that all submarines that can arrive can be reached will attack from different directions at the same time.

As a rule, ambush battles are fought at night.

The reason is also very simple, anti-submarine patrol aircraft and carrier-based aircraft cannot operate at night, and anti-submarine warfare ships such as destroyers are much less efficient at night.

In addition, submarines will use torpedoes as their main weapon, and they will attack from as far as possible from dangerous distances.

According to Duntz's orders, submarine captains were not to risk the capture of merchant ships, nor could they use naval guns or other means to sink merchant ships in order to save torpedoes.

Crucially, each submarine is sent to a sea area for combat patrol before leaving port.

The move was to ensure that there were enough submarines near any major route at any given time.

In order to improve the efficiency of ambushes, the submarine mainly operates in the central waters of the Northern Fanyan Ocean, that is, far away from the mainland of the Bran Kingdom and the isolated continent.

Comparatively speaking, in the middle of the route, the fleet received the weakest cover.

Due to range limitations, there is a "blank" area of about 1,000 kilometers in the middle of the North Fanyan Ocean, that is, the long-range patrol planes deployed on the mainland and the isolated continent of the Bran Kingdom cannot fly over, and can only rely on the patrol planes carried by the escort aircraft carriers and the escort destroyers to provide cover.

In order to improve combat efficiency, Dunz also acquired a number of long-range patrol planes with a range of more than 5,000 kilometers to search for convoys in the open ocean.

Three raids this month at least found that the convoy was made by these Henkel twin-engine aircraft, nicknamed "Gripen".

It's just that the most critical thing is actually the submarine support ship sent to the ocean in advance.

Before Dunz became commander-in-chief of the submarine force, the navy converted more than a dozen fast oil tankers built before the war into submarine support ships.

Probably worried about being encircled and suppressed, these submarine support ships had only operated in the bay and sea before, and did not go to the North Sunset Ocean to support submarine operations.

Most of the time, it acts as a floating dock for submarines.

By the time Dunz took office, more than a dozen submarine support ships were all sent to the North Sunset Ocean.

In a sense, the submarine was able to attack three transport convoys in a row in half a month, relying on these submarine support ships.

The reason is also very simple, without submarine support ships, the submarine will have to return to the mainland after running out of torpedoes.

In the battle of breaking the friendship with torpedoes as the main weapon, the torpedo is consumed at an astonishing rate.

Usually, a dozen torpedoes are consumed in a battle, and most of the mines carried by the Riman submarines are less than 30, and some old models are about 20.

The number one value of submarine support ships is to greatly improve the combat efficiency of submarines.

Previously, because they had to return to port to resupply torpedoes, and it took more than a month to sail back and forth, many submarine captains would use torpedoes as little as possible in battle.

Whenever possible, they float to the surface and sink ships with naval guns, and even send crews to plant bombs on ships after they have captured them.

As a result, many submarines fell prey to armed merchant ships or were sunk by patrol aircraft that arrived in time.

If torpedoes are used in their entirety, then the submarine will be on combat patrol only about a third of the time during the normal mission cycle. The other two-thirds of the time is spent either on the way to patrol, on the way back, or in the harbor to resupply.

The appearance of submarine support ships not only gave the captain no worries, but also saved the time of round-trip sailing.

Of course, submarine support ships provide more than torpedoes.

As long as the crew is in good spirits, they will be able to obtain ammunition, fuel and other supplies from the submarine support ship and continue to carry out the task of breaking the diplomatic relationship.

This alone more than doubled the combat efficiency of submarines.

In the past, a submarine had been on patrol for between 100 and 120 days, of which about 40 to 50 days had to be spent on round-trip voyages, and the actual deployment time was only 50 to 80 days. Normally, 60 days is nice.

Now the combat time of submarines in the open ocean has been extended to more than 150 days.

Even after deducting the 50-day round-trip sailing time, the combat patrol time in a mission cycle is more than 100 days, and sometimes even 120 days. For example, if a support ship arrives from the mainland, and the fruits and vegetables are still fresh, the patrol time can be appropriately extended.

As for morale, it's not too much of an issue.

In Niz's words, as long as the results can be achieved, the morale will not be low.

Don't forget, Niz is a submariner.

During the long period of operational deployment, what the submarine officers and men feared the most was that they had nothing to do and sailed for several months without encountering anything.

As long as the results are achieved, even a small cargo ship that is lone behind can make the officers and soldiers boast for half a month.

It's just that the victory of the submarine in the North Fanyan Ocean is not only because of the change of commander-in-chief, but also has a lot to do with the alliance group.