It was presumed to be in its good glory until Heinz Doofenshmirtz formulated a plot to take over by creating a army of giant robots and a general cyborg to lead them. The plot was successful, and the entire Tri-State Area was molded into Doof's image to satisfy his family's needs while maintaining their rule for 5 years. Doof's wife Charlene also took a role of the hostile takeover by turning several of O.W.C.A.'s agents into cyborgs to serve for the family.
However, after the 5 years passed, Doofenshmirtz was finally defeated after his plan to invade the original Tri-State Area is foiled, resulting his arrest and the Norm Bots' destruction. As such, the Tri-State Area started to return to its former glory, even when Doofenshmirtz escaped from custody with the help from his family 2 months later.