The 1990 Brookhaven Border Massacre happened in January 1990 as a one-manned terrorist attack, which resulted Silly Cat the 1st to get arrested for the first time. It would be a very brief sentence, however, and he was released two hours later as the prison was overflowing with newly orientated inmates (the prison had a policy on one inmate per cell). It was when Silly Cat the 1st, under the pretext of a border guard of the Brookhaven Militia, massacred 145 Robloxians within the exterior of the city limits.