The rebels sought the support of Mieszko, which the Polish king granted and promised to take military action against Conrad. Conrad returned to Germany in mid-1027, putting an end to the rebellion before Mieszko could deploy his forces. In preparation for his own invasion of Poland, Conrad developed a closer relationship with King Cnut of England and Denmark (whose kingdom lay beyond the Empire's northern border). Cnut accompanied Conrad at his imperial coronation in 1027, and Conrad granted Cnut the authority over the March of Schleswig, the land-bridge between Denmark and Germany.