On December 26, 20078, the Principality of Zeon proposed to the Earth Federation for a second peace negotiation.

The Confederation accepted Zeon's offer and placed the negotiation site in the permanent city of von Brown on the lunar surface.

On January 1, 0079, the U.C. of the Cosmic Century officially began.

On the same day, on his way to the negotiating venue, the Principality's negotiator, Darcia Bajaro, the Prime Minister of the Principality, was bombed, but the Prime Minister himself was lucky to be unharmed.

The bomb attack killed 57 Zeon officials, staff and entourage, and 19 von Brown police, who were in charge of street martial law.

As soon as this news came out, it caused an uproar in the earth's sphere.

Zeon clung to the fact that his head was almost killed, claiming that the Earth Federation had no sincerity in negotiating, and Zeon's intelligence found conclusive evidence within 12 hours of the time detonation, and a set of photos suspected of being planted by the Earth Federation Army pushed the Federation Army to the forefront.

The Commander-in-Chief of the Principality of Zeon, Gilian Zabi, commented on the incident in his speech to the Earth's Sphere:

"Since the beginning of the cosmic century, we have never heard of the use of despicable and shameless assassination methods because of differences between nations."

"In order to show our good faith in negotiations, we have sent our Prime Minister all the way to the moon, and the Earth Federation has trampled on our goodwill so much that it wants to force us into a war that we do not want to see."

"However, this act of theirs just proves that the Earth Federation itself has been completely corrupted and is unable to shoulder the heavy responsibility of leading the progress of mankind, and it also proves that they have feared the resistance of the people of the universe to such a point!"

"They just proved that our cause is just!!"

"It is only when faced with a just cause that the vile little people have to use dirty means to organize, because in the face of justice they have no other way!"

"They know that we will stand firm and fight for the independence of the people of the universe, and that all the people of the universe will rally by our side!" “

They know that at the negotiating table they will not get what they want, only to take everything they want from us by violence. ”

"Citizens of the universe, the people of the entire earth, isn't this the time for us to rise up and resist?"

"For many years, the Earth Federation has defined itself as the ruler of all mankind, and they believe that those who live on the earth are the party responsible for the rule, and those who live in the universe are the party responsible for the ruled, and they call the reasonable demand of the people of the universe for independence and freedom treason!"

"If this is treason, I believe that all the people of the universe will follow us Zeon to commit treason together, because anyone with a little common sense and conscience knows that only the universe is the country of the people of the universe, and how can the old human beings who were born on the earth and have never been to the universe for a day have the qualifications to rule the new human beings who have opened up their territory for all mankind?"

"The Earth Federation has rotted! Their souls are captured by gravity! Therefore, it is impossible to understand how we, the people of the universe, who grow up in a gravity-free environment, hate bondage and yearn for freedom! ”

"It's time for the people of the universe to break the shackles on them! I believe the moment has come, unite around Zeon, people of the universe! Let's use iron and blood to solve the biggest and only problem of our time! ”

"Let's go to victory together!"

In the face of Zeon's condemnation, the Federation declared that 'this is a blatant slander, full of superficial ambitions and frame-ups', claiming that the so-called evidence provided by Zeon was forged and that the real assassin had been killed by the Federation.

The main emissaries were Flynn Hendrick from the SIDE 3 'Mahal' colony, and Flanda Munston from the asteroid base of Zeon Mining at Axis, whose bodies were revealed by the Federation Army, as well as the various weapons they had seized, as well as a large bomb belonging to Axis that had been sent from Axis.

They also publicized Flynn Hendrick's suicide note, which roughly means:

Born in SIDE3, Flynn Hendrick could not tolerate the dictatorship of the Zabi family, and in the face of the Zabi family's attempts to deceive the masses in the name of peace talks, he and his comrades decided to stop it and assassinate Zeon Prime Minister Darcia Bajaro.

In his suicide note, he said that the Earth Federation was originally the only legitimate government of mankind, trying to promote cosmic independence, inciting innocent people to fight against the Earth Federation, and making the Zabi family sacrifice for their own ambitions is a cancer of mankind, and he only hopes that his death can warn the vast number of colonial people and make them realize that the Earth Federation is not their enemy, and their real enemy is the Duchy of Zeon, which is a dictatorship in the name of independence and freedom, and the Zabi family.

The Federation publicized the incident in a high-profile manner, and buried Flynn Hendrick and others, who assassinated Darcia, on Earth, and built a luxurious cemetery for them.

According to the federal media, the so-called assassination of the Earth Federation accused by Zeon is simply untenable nonsense, and the person who carried out the assassination is undoubtedly a person with lofty ideals who was persecuted by the Zabi family, and the federal side advises Zeon people to recognize the true face of the Zabi family as soon as possible and not to go further and further down the wrong path.

The Federation said that in front of the Federal Space Army, the so-called Wehrmacht of Zeon has no power to resist, and the Federation also promised that the Federation will not only not punish the Zeon puppet army that defects, but will also reward them to a certain extent.

Zeon responded swiftly, and the argument lasted until three days later, on January 3.

On January 3, Prime Minister Darcia Bajaro of the Zeon side announced that he was abandoning the peace talks, and the negotiations officially broke down, and Prime Minister Darcia returned to SIDE3 the next day, but in the face of the departing Zeon fleet, the Luna II and the federal fleet of Granada did not pursue them.

On January 3rd, the Principality of Zeon Office in Earth officially submitted a declaration of war to the Earth Federal Government, and the Earth side refused to accept the declaration of war of the Principality of Zeon, saying that the Principality of Zeon was not a country with legal effect, but a puppet government and dictatorship that usurped the name of the country, and characterized the declaration of war of the Principality of Zeon as a rebellion.

On the same day, the SIDE7 'Noah' colony announced its support for the Earth Federation.

SIDE2 'Harty' colony declares its support for the Earth Federation government.

SIDE6 'Ria' colony has not yet made a public statement.

SIDE1 'Thorn' Colony has not yet made a public statement.

SIDE4 'Muya' Colony has not yet made a public statement.

The SIDE5 'Rum' colony has not yet made a public statement.

SIDE3 'Muzo' Colony declares its support for the Duchy of Zeon.

On the same day, the Principality of Zeon Wehrmacht Space Assault Fleet marched on the SIDE2 'Harty' colony that had publicly expressed its support for the Federation, and the Principality of Zeon Wehrmacht Assault Mobile Force Fleet marched towards Granada, the permanent city of the Moon.

On the same day, the Second Fleet of the Earth Federation Space Force began to lift off from Chabro, and the Fourth Mobile Fleet began to move towards the lunar surface.

On the same day, the Special Unit of the Assault Mobile Force, to which Lear Wolfgang Alxstein belonged, began to pursue the 4th Mobile Fleet.

At this point, the war officially broke out.

It is known as the 'One Year War'.