This article reviews the development of the Southeastern School Behavioral Health Community (SSBHC), which began in 2013 to bring coherence to the school behavioral health (SBH) agenda in South Carolina and has since expanded to become a regional effort in the southeastern United States. The term SBH is used to convey community mental health systems joining with schools and school mental health (SMH) providers such as school psychologists to strengthen the depth and quality of programs and services within a multi-tiered system of support (MTSS). The article provides background on the interconnected systems framework (ISF), focused on effectively joining SMH and MTSS; reviews the history of the SSBHC; and discusses its work to date and plans for the future, including an emphasis on school safety and violence prevention.