The stationing of front-line field troops such as the "Prince Eugen" brigade to the border is not a conclusion made on a whim, but a decision made after full dialectical and calculation in light of the actual international political environment and objective needs.

The rise of the elven faction is a foregone conclusion, and whether the nations like it or not, they can't change this established fact. What makes the countries even more depressed is that in front of someone who is so strong that they are foul, it is not even practical to open the table and have the option of a showdown, even if they are determined to die together, the result will only be a one-sided massacre, and the countries are the one who is ravaged and slaughtered.

There are no suicide volunteers in the upper echelons of the countries, and in the face of the harsh truth, they can only choose to bow their heads.

However, as many historical allusions tell the world, many times things cannot only look at the surface, when a certain country or a certain person bows its head to show respect, you cannot see what kind of expression is hanging on a face that is deeply lowered, let alone clearly grasp what kind of calculations are under those faces. There have been too many cases in history where conquerors have lost their lives because of the deferential appearance of the conquered people, and the elves do not want to be one of them.

So the "Prince Eugen" brigade was sent to Evian, where it was tasked with border control and the elimination of Charlemagne's remnants.

In the Battle of the Rhine, the main force of Charlemagne's army was completely destroyed, but this did not mean that Charlemagne's army and armed forces were gone. Some of the garrisons that survived the Battle of the Rhine were either disbanded on the spot or went underground in large numbers, while large quantities of weapons and ammunition flowed into the civilian population for various reasons. For a time, various armed groups sprung up all over Charlemagne, including die-hard soldiers who were unwilling to accept defeat, private armed forces of speculative groups, armed guards of landlords and nobles, and militias and family guards organized in village communities. These organizations are not affiliated with each other, have conflicting philosophies, and fight for land and resources. During this time, the elves were too busy fighting economic warfare to take care of Charlemagne's fire. When the dust of the economic war settled, the defense forces, which were no longer indifferent, acted quickly, and the huge "encirclement and suppression" quickly swept through Charlemagne's entire territory, and countless armed organizations that dominated one side were wiped out overnight.

Compared with the rapid and chaotic clearance of the interior, the progress of the border area is somewhat unsatisfactory.

Especially in the mountainous area bordering Serres, the progress of the suppression of bandits was not even satisfactory, and it was completely stagnant.

Since ancient times, the harsh geographical environment will give birth to fierce folk customs, and the so-called "poor mountains and bad waters out of the people" refers to this situation. The Swiss, Serbs, Afghans, and Caucasians of the other world are all mountain people who are known for their skill in mountain guerrilla warfare, and the regular armies of many powerful empires in history have suffered enough at the hands of these unruly mountain people. The inhabitants of Charlemagne's mountain area may not have a good quality of individual soldiers, but the influx of a large number of weapons and former soldiers quickly made up for the lack of combat effectiveness of the mountain people, coupled with the tough style of all the people fighting to the death, so that the defense forces did not dare to underestimate the difficulty of this encirclement and suppression operation. To add insult to injury, the people in the border area between Charlemagne and Serres were originally less national, and the long border was nothing more than a signpost for them, and it was not uncommon for the two sides of the border to be closely related by blood. Once the battle is unfavorable and the guerrillas are at a low ebb, they are likely to go to relatives on the other side of the border, or they may go underground to receive aid from abroad (either spontaneously or at the behest of the Serres authorities), and slowly regain their strength and rebel again. This complex situation is bound to make it more difficult to clean up and suppress the situation. It is not necessary to send troops directly to Seres in order to suppress the bandits.

At one point, the General Staff wanted to solve the problem by blocking the border, but they soon found out that this was simply impractical. First of all, they don't have so many troops on hand, and now in order to control the occupied areas, the Imperial Defense Force has invested most of the mobile troops on hand, and the second-line garrison troops in the country have also been almost transferred, and even then, they are only barely achieving their goals. If the troops were to be sent to blockade the border, the Imperial Defense would have to garrison some key cities along the supply lines of roads, railways, and rivers, and cede the land outside the cities and communication lines to the Charlemagne, which was obviously unacceptable to them.

Is it possible to launch a large-scale encirclement and suppression operation, and to devote a large number of troops at one time to completely wipe out these troubles? Moreover, it is also possible to issue orders to intimidate the people who assist the guerrillas, for example, for every one defense soldier killed or wounded, it will be reduced by 50~The lives of 100 natives were to be repaid, any act of helping the guerrillas by local civilians would result in their own immediate execution, and the death of all family members and relatives of a person who was confirmed to be part of the guerrillas, yet as Charlemagne's occupation of Castile had shown, no matter how heavy troops were mobilized, they were always underpowered and under-means in the mountains. Attempts to spread terror to stop resistance have proven to be counterproductive on numerous occasions.

After study and discussion, the General Staff concluded that in its current form, it is impossible to achieve a goal of mobilizing large forces to encircle and suppress the border or to mobilize troops to blockade the border. The only viable alternative would be to invest in small-scale special operations units and launch a surprise attack on the guerrillas' quarters and core figures—in the military terminology invented by the emperor, "decapitation operations"—and to plunge the guerrillas into a leaderless state of chaos with a fierce surprise attack, and then break them down and annihilate them individually. The arrival of the "Prince Eugen" brigade was the outpost of the combat operation codenamed "Rosselsprung" (a powerful and unexpected blow on the chess board).

According to the plan of action, the task of the "Prince Eugen" brigade at the initial stage of the plan was to attract the attention of the partisans, familiarize themselves with the local operational environment, and provide an important basis for the second phase of the operation. This unit is already specialized in mountain warfare, and its ability to adapt to and familiarize itself with lofty mountains and mountains is much faster than that of ordinary army units, and it also has a greater say in the use of various equipment in mountain warfare, and the first-hand information they provide will inevitably have a major impact on the success of subsequent operations. At the same time, as a strong mountain warfare force, the "Prinz Eugen" brigade stationed in a border distribution center like Evian will inevitably attract attention, and the guerrillas who are also skilled in mountain warfare will inevitably pay attention to the unit's every move and spare no effort to attack the supply lines and try to sabotage the preparations of the "Prinz Eugen" brigade. In this way, most of their intelligence and military power are contained, and the intelligence services can more calmly avoid the eyes of the guerrillas and gather information that is essential for the decapitation operation.

In short, the "Prince Eugen" brigade was a cover, a decoy used to attract sights and bullets, to conceal the true operational intentions of the Imperial Defense Forces. For the officers and men of the "Prince Eugen" brigade, this meant that they were doomed to a depressing time.