Nevertheless, the harsh measures devised by Augustus and implemented by his general Marcus Vipsanius Agrippa to pacify the province in the aftermath of the campaign only contributed to further instability in Cantabria. Near-constant tribal uprisings (including a serious slave revolt in 20 BC that quickly spread to neighboring Asturias) and guerrilla warfare continued to plague the Cantabrian lands until the early 1st century AD, when the region was granted a form of local self-rule upon being included in the new Hispania Tarraconensis province.