Since its return to Romania, Thessaloniki has been unusually busy, with construction sites starting at any time. According to the city government, there are currently up to 80,000 workers working in Thessaloniki. The construction of a series of facilities such as docks, warehouses, and large cranes has changed dramatically in Thessaloniki.

Construction is also underway in the town of Kalamaria, just outside Thessaloniki. Less than half a kilometre southeast of the town, a hill facing the sea was bustling with activity, and the town's idle laborers went to help. I heard that a new signal transmission station will be built to provide signal support for navigation in the surrounding area.

This is a good thing, many people in the town have been seafarers and know the dangers of the sea. Not to mention, the salary given for this construction is not bad, I heard that the time required is short, so there is such a high salary.

Therefore, thanks to the efforts of the patriotic masses, the construction of the signal transmitting station is extremely fast and has almost reached the final stage.

And the real purpose of this is hidden, in fact, this thing is called a radio detection and ranging instrument, which is what everyone calls radar.

In fact, it was not late to develop this thing, and Romania began to develop it independently shortly after the end of World War I. It's just that limited by the gap with its own level and a large number of instruments have not yet been invented, and its research and development is very slow. For the great Romanian guide knew only the noun of this thing, and could do very little to help.

After Mussolini came to power, relations between the two countries warmed rapidly, and during Eder's visit to Italy, radar was added to the joint research and development of new technologies between the two countries, because Italy's radio research was higher than that of Romania.

Although Marconi, the inventor of radio, focused most of his efforts on his English radio company, his research in Italy was no slouch at all. As early as 1922, in a speech delivered by the American Institute of Electrical and Radio Engineers, Marconi mentioned the use of radar. Although his original intention was to prevent ships from colliding, his ideas were highly inspiring for later research.

In the same year, Taylor and Young of the United States suggested that two warships be equipped with high-frequency transmitters and receivers to search for enemy ships, which was also inspired by Marconi's report.

With the beginning of joint research and development between the two countries, the development of radar has entered a new stage. In particular, with sufficient financial guarantees, the construction of the first experimental radar was completed in 1927.

Although the experimental radar was built earlier, it is far from practical. The main reason is that the detection range is not enough, and the work is unstable, but its development prospects are enough to attract attention.

After attracting the attention of the military, the momentum of radar development has not weakened at all. From the beginning, it was only possible to detect airships at a distance of more than ten kilometers, and it was also necessary to build huge launch sources up to fifty or sixty meters high. Up to now, radars capable of detecting sixty or seventy kilometers only require a thirty or forty meter high emission source.

Of course, the current radar still does not satisfy the navy and the air force, and they want a radar that can be installed on warships and aircraft, rather than such a huge radar that can only be used for ground-based sounding. However, with the development of the situation in Europe, it is no longer possible to wait, and the military can only accept this kind of achievement first, which can be used for air-to-sea early warning.

Therefore, in key areas of Romania, such as the border with the Soviet Union, important ports, military points, transportation hubs, etc., radars for early warning were built in advance.

And as Romania's most important port in the Mediterranean, Thessaloniki definitely deserves this treatment.

And the radar in Kalamaria is just one of the ones that provides early warning, and there are six radars in Thessaloniki that provide early warning against any possible surprise attack.

Of course, this information was only known to Major Andrel, the person in charge of directing the construction, and the others were completely unaware of it, and only thought that it was the installation of a signal station. Of course, this is also a radio signal station, but it is not about communication.

Angliel looked at the busy construction site and asked his deputy beside him. "Our construction work here is almost complete, when will the installation and commissioning people come?"

The deputy was clearly familiar with this, and he opened his mouth to answer. "At the moment they are also installing a radar station in the area in Rodnina, and it will take another four days to build the area. With no other platforms in advance, I had to wait at least four days before I could go. ”

"Very well, you need to keep an eye on their progress and pick them up as soon as the climb is finished."

Obviously, in order to rush the progress, Anglil also used means. There is no way, because he has received information from covert channels, and the priority accomplisher of this task may get the commander of the early warning force.

So this time he plans to use means to get himself this position.

It's just that someone is faster than him, and he can only be ranked second.

For Andrel, this competition cannot afford to lose, because the unit will be the key to his transformation from a technical officer to a military officer, and Andreel is determined to win.

And when the construction of radar stations was intensified in various places, Germany, which was supported by Romania and Italy, was also becoming more and more tough on Poland.

In June, he openly declared that Danzig and the Polish Corridor should join Germany unconditionally, since the region had always been inhabited by Germans for generations. However, under the influence of the Treaty of Versailles, it was forced to cede to Poland. Now the German Reich needed to change this wrong decision.

Hitler's words continued to raise the patriotic fervor of the German people, and the expectations of him at home were further increased. However, Hitler's speech did not seem to have had much reaction in Europe, and in addition to the neutral countries hoping that the two countries would put aside their arguments, Britain and France, which he cared about the most, did not react violently enough to it. The two countries only further raised the Polish question as non-negotiable, and then they were busy with the matter of arms build-up and warfare.

However, although Britain, France and Poland ignored Germany's attitude, there was one country that was frightened by Germany's statement, and that was Lithuania.

How dare such a small country forcibly occupy German territory?

That's right, Lithuania is encroaching on German territory. After the end of World War I, Lithuania took advantage of the chaos to forcibly occupy this German-majority area, and with the support of the League of Nations, it has been in control until now.

And now Germany's hardline attitude on the Polish question has terrified Lithuania. How could Hitler have forgotten the Lithuanians, only this time it was a little late to demand the return of Lithuania. And the result, as in history, in the face of German coercion, the Lithuanians immediately succumbed.

And the ecstatic Hitler, accompanied by the Commander-in-Chief of the Navy Raeder, took the battleship Bismarck to Memel to inspect the returned region.

Now he was more confident in the further takeover of the Danzig and Polish corridors.

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