Following the aftermath of Operation Black Eden, the remnants of the United States military and the Special Research Projects Administration (S.R.P.A.) mounted a desperate but disastrous attempt to destroy New York's Chimeran Tower and prevent the Chimera from terraforming Earth, however the assault turned into a massacre for the American forces who barely penetrated the Tower before being wiped out by Chimeran defenses. This assault marks the end of the Invasion of the United States and S.R.P.A. and the beginning of the overall Chimeran occupation of the country.