The francisco disaster was the most deadly terrorist attack ever, in total 7,683 people where killed and 673,456 people where wounded. The US goverment claimed it was done by the Asian Union. But in reality it was the US goverment that organized and did the attacks.
besides the thousands of deaths and wounded, most buildings in the city where either destroyed or crushed in the attack the damage was so great that the US decided to relocate all inhabitants for an unspecified amount of time. It was only in 2095 that the so called New Fransisco was created by the AU.