           With the accession of Antonio I to the throne after the death of his father, he failed to cultivate the positive relationship with the Portuguese that his father had. This led to an alliance of the Angolans with the Kimpanzu in Sonyo, with a successful and destructive campaign against the capital, Sao Salvador. Eventually, Antonio himself was killed on the battlefield, sparking an even greater crisis. It was a disastrous and humiliating battle for Kongo, which lost many of its nobles along with the king. While the Portuguese took the royal regalia back to Lisbon in triumph, they generally were not any more heavy-handed in their oversight of the region than they had been before. However, Sonyo, and therefore the Kimpanzu clan, was now able to take the offensive against a weakened and disorganized Kongo.