- The Tundzha Regional Archaeology Project (TRAP), a cooperative effort including Australian, Bulgarian, and Czech investigators, undertook large-scale archaeological and palaeoenvironmental field research between 2008-2011. In this work, we focused on two study areas: the intermontane Kazanlak Valley along the Upper Tundzha River of central Bulgaria and the Thracian Plain along the Middle Tundzha River south of the city of Yambol in southeastern Bulgaria. Major field activities included over 100 sq km of systematic pedestrian survey, satellite image analysis, legacy data verification and mapping, trial excavations, artefact analysis, and environmental sampling in and around the study areas. Through this research, we inventoried over 100 surface artefact concentrations and 800 burial mounds. During and after this fieldwork, we analysed soil samples to characterise erosion and agricultural productivity in the Kazanlak Valley, and used palaeoecological samples to build a 30,000-year environmental history of the northern Thracian Plain. Bone and palaeobotanical samples from Yambol allowed us to explore diet and subsistence strategies among past local communities. In the years since, we carried on with specialised studies. In the Yambol region we analysed trade and explored shifting Roman habitation patterns through targeted excavation and ceramics analysis, and used historical maps to locate additional features that were verified via ground truthing. Recently, human teeth from one of our burial sites were used for DNA analysis and contributed to a major re-evaluation of archaeogenetics in southeastern Europe. Throughout, the project has pioneered digital research methods, from field recording using mobile devices to the use of machine learning to extract features from maps (promising) and satellite images (less so). TRAP continues to publish based on data collected during past fieldwork.