The uprising against Bulgarian occupation in northern Greece was a significant resistance effort launched by local populations during World War II. After Bulgaria invaded and occupied parts of northern Greece in April 1941, the local citizens faced severe repression, forced conscriptions, and economic exploitation. Many residents were driven to join various resistance movements, which sought to undermine Bulgarian authority and aid the broader Allied efforts in the region. The uprising in September 1941 was marked by coordinated attacks against Bulgarian military outposts, sabotaging supply lines, and rallying local populations to join the fight for autonomy. Leaders of resistance groups such as the Greek Communist Party made concerted efforts to unify various factions under a common cause, allowing for organized and effective strikes against the occupiers. The use of guerrilla warfare tactics was prominent, as it utilized knowledge of the difficult terrain to launch surprise attacks and retreat quickly to avoid severe reprisals. This uprising was not only a crucial moment in the fight against Bulgarian oppression but also signified the growing strength and organization of Greek resistance movements, which would continue to play a vital role throughout the Second World War.