The presentation will give a concise overview of the theory and modeling activities in the field of disruptions and REs in Europe. It will cover activities by the EUROfusion project TSVV-F and its collaborators. The scope of the project will be described, the research questions will be explained, and the link to the hierarchy of available lower and higher dimensional models with different fidelities will be provided. While the presentation focus will lie on RE formation, transport, and termination, also questions of natural disruptions, thermal quench dynamics, vertical displacement events and disruption mitigation by shattered pellet injection will be addressed, covering all phases of disruption dynamics and the resulting disruption consequences. In particular results obtained with DREAM, LUKE, JOREK-DREAM, JOREK, CARIDDI and FIREWALL will be included. For work that will be shown in a dedicated presentation at the REM meeting, a single slide will be shown as teaser. Where no dedicated presentation is planned, a few more details will be provided. All slides will contain references to the respective first authors conducting the work.