On February 5, Cosmic Era 70, the United Nations held a peace summit with the PLANT colonies in Copernicus City on the Moon. However, after a terrorist bomb wiped out the UN leadership, the newly formed Earth Alliance issued a declaration of war against the PLANTs.
Days later, on February 14, the Earth Alliance launched a nuclear strike that destroyed the colony of Junius 7, killing over 240000 civilians. This catastrophe, known as the Bloody Valentine incident, was the beginning of a brutal war between the Earth Alliance and the PLANT colonies.
This conflict was initially known as the Bloody Valentine War, but history would remember it as the first of the Alliance-PLANT Wars.