After a visit to Königsberg, Crown Prince Hirohito and his entourage traveled west and arrived in Berlin again on Christmas Day.

After reaching an understanding through letters, the atmosphere at Tatsuten's meeting with Hirohito was much more relaxed. That night, a grand Christmas dinner was held at Gonglu Palace, and Hirohito was naturally the guest of honor, and ambassadors and ministers from various countries were also invited, including diplomats from Chile, Argentina, Peru, and Bolivia.

The theme of the banquet was peace, friendship and respect, but everyone could see that the three-person gang composed of the Chilean ambassador and the ambassadors of Argentina, Peru and Bolia were simply enemies who were very angry when they saw each other.

As the only power on the American continent, the US Government is expected to mediate and mediate, and the US Secretary of State Robert Lansing has indeed been actively campaigning among the South American countries in recent times. However, discerning people can see that this kind of behavior of the US government is not as noble as it seems on the surface, and as the No. 2 investor and creditor country in South America, the United States does not want to see the Chileans deepen their cooperation with Germany, still less does it want Germany to increase its influence in South America through Chile.

Warren Harding and his government could not sit still after the Chilean Navy acquired two formidable German battleships, and they found common ground on this issue with the British government in exile, the No. 1 investor in South America. Although Edward VIII's government-in-exile was in Canada and its military strength was much weaker, most of the wealthy people in the country followed them to Canada, and these people were indeed big investors in South America, so the British also did not want to see the Germans join forces with the Chileans. At the initiative of the United States and Britain, Argentina, Bolivia, Peru and Brazil, the largest country in South America, sat together. The four-nation meeting in Buenos Aires, Argentina, quickly achieved the desired results of the United States and Britain – the four countries agreed to form an anti-intellectual alliance and signed a series of secret terms to jointly counter the potential threat from Chile politically, economically, and militarily.

At the dinner, Chen Tian had a cordial conversation with Chilean Ambassador Patricio for more than half an hour. Lieutenant Commander Eduardo, the Chilean Navy's military attache in Berlin, was also favored by the German admirals, who talked happily from the beginning to the end of the dinner. This situation made the ambassadors of Argentina and other countries quite dissatisfied, and they even tried to find some balance from the Japanese crown prince, but seeing that the Americans were very unhappy about this, and the Japanese were not enthusiastic, they honestly returned to the Americans.

After the dinner, Hirohito received a special gift from the Kaiser – blueprints for the Fortress-class Zeppelin and the Hummingbird fighter, although there were only a few drawings of the aircraft of this era. But countries are well aware of what they mean. So, Hirohito was surprised and delighted to accept the gift, and in exchange, he gave the Kaiser a piece of jade that he had brought with him.

After Christmas, Hirohito resumed his journey, and the "unfair treatment" he had suffered in Königsberg never again appeared on the subsequent trip. In Hamburg, he was warmly welcomed by people from all walks of life, and accompanied by the mayor of Hamburg, he also visited various famous shipyards in Hamburg, including the Vulcan shipyard, where the battleship "Elector" was built, and the Blochfors shipyard, where the battlecruisers "De Fllinger" and "Thessaloniki" were built. Prince Hirohito even attended a grounding ceremony on a German cruiser as a guest of honor.

In the port of Kiel. Hirohito toured the entire naval base and boarded one of the main ships of the German North Sea Fleet, the Bavarian-class battleship Baden, which was also the strongest first-class battleship in Germany to date. Originally, four ships were to be built, but the latter two were halted due to the Washington Naval Treaty, so only two ships, "Bavaria" and "Baden", were built and put into active service. In addition, the famous Zeppelin of the German Navy was specially practiced for the Japanese crown prince in the place where he visited, and if it were not for the entourage who tried to dissuade him on the grounds of safety, Hirohito would even take an airship to the air to see it. Despite this, he was the first to experience the astonishing momentum of the German airship formation, and Hirohito felt both admiration and envy when he thought that the Germans used nearly 400 airships to "intimidate" the Austrians.

In Wilhelmshaven and Cologne, Hirohito was equally warmly received. Subsequently. He traveled to Paris as planned.

After three years of reconstruction, Paris no longer has any traces of the war. It's just that the puppet government of Deschanel was unable to rebuild an Eiffel Tower due to its heavy debts, making every visitor to Paris feel that the city was missing something. Fortunately, the Arc de Triomphe, the Louvre, and Notre Dame Cathedral are still there, and these famous buildings are a feast for the eyes of guests from Japan. Prince Hirohito also personally paid homage to Napoleon's mausoleum in the Palace of Disabled Soldiers and donated 100 euromarks as a sign of respect for the French emperor. A small bust of Napoleon was also bought from a small roadside shop as a souvenir.

At the end of his trip to Paris, Hirohito boarded his country's battleship Katori in Le Havre and sailed across the English Channel to London under the escort of the Kashima and a German fleet. As in Paris, the traces of war have largely been erased by time, and the Britons were friendly to the former Allied Crown Prince, and their king, Robert I, invited him to stay in his palace for a few days. On March 3, 1919, Prince Hirohito arrived at the last leg of his European tour, which was an eye-opener and an important turning point in his life, according to Hirohito's later recollection.

Shortly after leaving Ireland, the Katori and Kashima, who were escorting Hirohito home, came across a combined fleet of German and British navies, and upon questioning, they learned that the fleet, consisting of one battleship, four cruisers, and two supply ships, was on a mission to South America. The fleet was scheduled to set sail in the middle of the month, but in anticipation of the Japanese fleet's visit to the Americas, the Kaiser himself ordered the fleet to set sail early so that it could accompany the Japanese fleet. Since it was the Kaiser's good intentions, Hirohito gladly accepted it, so nine ships lined up in a column and sailed mightily across the Atlantic.

On March 19, the fleet arrived in New York, USA, which was not only Prince Hirohito's first visit to the United States. It was also the first time that the navy of the Kingdom of Britain visited an American port. Despite the fact that the German, Japanese, and Robert I's Kingdom of Britain were unpopular in the eyes of many Americans, the mixed fleet spent a week in New York, and Hirohito personally went among the Japanese diaspora and visited famous sites such as the Statue of Liberty. The two cruisers of the Kingdom of Britain were not idle, they not only invited the citizens of New York to visit the ship, but also performed gun maneuvers and parade performances, and informed the Americans that they were from the Kingdom of Britain. And not homeless United Kingdom of Great Britain and Northern Ireland!

Although the mixed fleet was under the guise of a goodwill visit, in the eyes of Warren Harding and his people, the joint action of the Japanese, German, and Kingdom of Britain maritime forces was not a good thing for the United States. Although the original "German-British Peace Treaty" had stipulated that the Kingdom of Britain could build warships with the consent of the German government, when the navy of the Kingdom of Britain appeared in front of them, they realized that this was a plot of the Germans - since the Kingdom of Britain had not joined the Washington Naval Treaty, the Germans could build a large number of foreign warships in the name of the Kingdom of Britain!

Just when the U.S. government was racking its brains to think about how to make up for the loss, the mixed fleet began to sail to South America, and the Americans did not expect what kind of impact such a complex fleet would have on the situation in South America.

On April 3, the mixed fleet arrived in Rio de Janeiro, the capital of Brazil. At this time, the reputation of the Japanese here was not too bad. It's just that almost all of them would have been wary of the Germans, because the government had told them that the Germans and the Chileans had formed a military alliance, as for the two warships flying the flag of the Kingdom of Britain. Most people of British descent are extremely despicable.

Coincidentally, when the mixed fleet visited Rio de Janeiro, the heads of the four countries of the anti-intellectual coalition, Brazil, Argentina, Bolivia and Peru, met here. On the third day of the meeting, the President of Uruguay also joined in, and the five countries that had a common language on the Chilean issue soon signed the Treaty of Rio de Janeiro, that is, if one of the five countries of the treaty went to war with Chile, the other four countries jointly declared war on Chile.

On April 6, 1919, the day after the signing of the Treaty of Rio de Janeiro, the mixed fleet of the navies of Germany, Japan, and the Kingdom of Britain was preparing to leave port at 10 a.m. when it suddenly received bad news at 8:30 a.m.:

After learning of the signing of the Treaty of Rio de Janeiro. The Chilean government decided to strike first, and after overnight discussions with the German government, Chile declared war on Brazil, Argentina, Bolivia, Peru and Uruguay at the same time, and the South American War broke out!

The German commander of the mixed fleet was Rear Admiral von Dalwijk of the German Navy, the Japanese commander was Prince Hirohito, and the deputy commander and actual commander was Rear Admiral Yoshida Yoshida.

According to the plan of the Japanese side. Two Japanese battleships were to carry Hirohito on his way to Uruguay, Argentina, and Chile before heading to Japan's Tahiti naval base and eventually across the Pacific Ocean back to Japan, with the combined German and British fleets destined for Santiago, Chile's capital.

After consulting with Major General Yoshida, Hirohito decided to cancel the scheduled visits to Uruguay and Argentina, and if the Chilean coast was not blocked by the coalition forces, then they would go to Santiago de Chile to replenish food and fresh water, and if the Chilean coast had become a war zone, they would go directly to the Polynesian islands.

However, just as Rear Admiral Yoshida was about to convey Prince Hirohito's decision to the German side, the flagship of the German fleet, King Albert, suddenly fired on the coast of Brazil with its 305-mm naval guns, and fired more than 100 shells in just a quarter of an hour, reducing a Brazilian naval shipyard not far from Rio de Janeiro to rubble.

It turned out that the German commander, Major General Dahlwik, had just received a telegram from Berlin that Germany had declared war on the five-nation alliance in South America at 9:30 a.m. that day!

At the beginning of the shelling, the Brazilians did not react in time, but just as the mixed fleet was about to leave, a Brazilian coastal defense battery near Santos suddenly opened fire on them, and 150-mm and 210-mm shells fell on the sea near the mixed fleet. The German ship "King Albert" is a Kai-2 class battleship, with 10 50 times the diameter of 305 mm cannons, firepower and range are in the Brazilian battery artillery supremacy, so under the command of Rear Admiral Dalvik immediately gave the Brazilians the color, the four cruisers in the fleet - the German Schliefen-class cruiser "Bayreuth", the Guardian-class cruiser "François", the British King-class cruiser "Scotland", "London" also joined the artillery battle, after a fierce artillery fire, The Brazilian battery finally fell silent, and the whole battle took less than half an hour, during which the two Japanese ships did not take part in the battle, but they did not stay far from the sea, let alone make their position clear to the Brazilians. At this time, no matter how long Prince Hirohito was, Major General Yoshida was confused by this successive sudden times.

After the artillery battle at Santos, the mixed fleet continued south along the coast of Brazil and shelled the coast of Brazil in the afternoon, evening and night, killing and wounding many Brazilian soldiers and civilians. Since Germany had declared war beforehand, the German ships were justified in doing so, and the Brazilians could only morally condemn the German government for harming innocent civilians, but the situation was very different with the two Japanese battleships. Although the Brazilian government did not have conclusive evidence that the two Japanese ships were involved in the shelling, the Brazilian government sent an urgent note to the Japanese diplomats, asking the Japanese government to make a clear statement and guarantee on its own position, but the reply given by the Japanese government to the Brazilians that night was war, because the Brazilian coastal defense forces had opened fire on the Japanese crown prince's ship!

Considering the clause in the German-Japanese Singapore Secret Treaty that one country is at war with a third country and the other country is obliged to sever diplomatic relations with that country and take active military action, the Japanese government's move can be regarded as a smooth sailing, and Hirohito did not object after receiving the secret telegram from China.

On 7 April, Japanese ships took part in the first shelling of the coast of Brazil, when the Katori and Kashima fired grenades at targets using their respective 305-mm primary and 254-millimeter secondary guns.

At noon on the same day, the government-in-exile of the United States and Britain declared war on Chile and announced that they would give full assistance to the South American alliance of five countries.